Electrical & Instrumentation

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Most liked posts	Author	Posted	Liked	Forum
Dashboard PCB Replacement (CJH Design)	The Hairy Camper	23 Jan 2026, 17:38	3 times this week	Electrical & Instrumentation
Heater fan gone - should I replace resistor pack with Jeep spec or PWM controller?	Rik	22 Jan 2026, 08:27	Once this week	Electrical & Instrumentation

Topics

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Last post

Oil pressure buzzer

Last post by Robsey « 28 Aug 2025, 20:26
Replies: 4
by F41XTH » 28 Aug 2025, 11:58

I took both the rocket covers off to try and diagnose why they were both leaking, I've got new gaskets to put on but took it for a quick errand drive...

4 Replies

5724 Views

Last post by Robsey
28 Aug 2025, 20:26
Reverse lights

Last post by F41XTH « 28 Aug 2025, 14:54
Replies: 2
by F41XTH » 25 Aug 2025, 17:10

I have no reverse lights at all. The bulbs work as I have checked them

A multimeter read on the reverse wire comes in at 3v, could anyone please...

2 Replies

5699 Views

Last post by F41XTH
28 Aug 2025, 14:54
Gasure wiring diagram needed

Last post by crazydiamond « 27 Aug 2025, 09:15
Replies: 4
by crazydiamond » 25 Aug 2025, 15:07

My LPG ws installed hundreds of years ago by thr late great Steve Shaw Gasure. It stopped running today, and it appears that the shutoff solonoid on...

4 Replies

5723 Views

Last post by crazydiamond
27 Aug 2025, 09:15
Confused about solar arragements...

Last post by Rosie n' Jim « 26 Aug 2025, 18:56
Replies: 1
by bubba slapbum » 23 Aug 2025, 19:22

Why are you forbidden from doing uneven panel numbers on a single MPPT?

I have 3x in series already and would like to add an uneven number in...

1 Replies

5461 Views

Last post by Rosie n' Jim
26 Aug 2025, 18:56
No parking light on an 84 westy

Last post by pirate-pete « 25 Aug 2025, 16:51
Replies: 7
by badgerfax » 23 Aug 2025, 09:49

My 83/84 Westy has no parking break warning light. Is this normal for early vans?
I had a look through the bentley PDF on here and it shows a parking...

7 Replies

6353 Views

Last post by pirate-pete
25 Aug 2025, 16:51
rear brake lights

Last post by digaholedumper « 25 Aug 2025, 07:32
Replies: 12
by tonyandhelen » 17 Oct 2014, 15:03

hi all, just wondering if anyone has had the same problem i m experiencing. my rear brake lights seem to stay on even when the ignition is off,...

12 Replies

13486 Views

Last post by digaholedumper
25 Aug 2025, 07:32
lumpy idle and backfire

Last post by Dad « 24 Aug 2025, 18:58
Replies: 5
by JulesMartin » 02 Aug 2025, 08:41

Hi Guys, thanks in advance for reading and any help much appreciated. I'll have to give you a bit of background to the problem first. T25 1986...

5 Replies

6043 Views

Last post by Dad
24 Aug 2025, 18:58
Coolant Temp LED Not working (No flashing or solid on when gauge Sig shorted to ground)

Last post by ManicGTI « 22 Aug 2025, 21:43
Replies: 7
by ManicGTI » 22 Aug 2025, 08:45

So, my coolant gauge LED does not illuminate. No flashing at start up, no flashing with level sender unplugged or 42/43 relay removed.
Also, no...

7 Replies

6108 Views

Last post by ManicGTI
22 Aug 2025, 21:43
Some clarity for wire sizing for 2nd leisure battery

Last post by bubba slapbum « 21 Aug 2025, 16:33

by bubba slapbum » 21 Aug 2025, 16:33

Hi guys. I just read through this thread: viewtopic.php?t=176547

There seem to be two schools of though though which seem almost equally popular....

0 Replies

7900 Views

Last post by bubba slapbum
21 Aug 2025, 16:33
Auxiliary water pump wire

Last post by DarrenC90 « 21 Aug 2025, 07:09
Replies: 25
by DarrenC90 » 24 Jul 2025, 21:57
1

2
Hi fellow T25 owners. Please help. I bought a van with what I’m pretty sure is an AAZ engine conversion.

The auxiliary water pump does not come on...
25 Replies

44746 Views

Last post by DarrenC90
21 Aug 2025, 07:09
Earth points

Last post by R0B « 19 Aug 2025, 19:02
Replies: 2
by Jay Goll » 19 Aug 2025, 11:28

Hi,

I wanted to check the article on bad earths in wiki, anyone send it to me as I can’t open wiki on my phone for some reason.

Thanks

Jay

2 Replies

5506 Views

Last post by R0B
19 Aug 2025, 19:02
1.9 WBX Distributor Woes

Last post by Callie’s Camper « 16 Aug 2025, 15:01
Replies: 3
by Callie’s Camper » 26 Jul 2025, 22:22

Good Evening!

First post so apologies is it’s in the wrong location…

I have a 1.9l WBX T25 panel van which I have been going through over the past...

3 Replies

8891 Views

Last post by Callie’s Camper
16 Aug 2025, 15:01
Westfalia tow bar wiring

Last post by Simon Baxter « 13 Aug 2025, 14:45
Replies: 4
by paradox » 21 Jul 2025, 18:38

Would the tow bar socket on a German import westfalia be wired the same as a uk trailer plug?

I connected my trailer up today and the lights are not...

4 Replies

11200 Views

Last post by Simon Baxter
13 Aug 2025, 14:45
T25 Autosleeper fresh water tank gauge and probe

Last post by Cobra88 « 12 Aug 2025, 13:34
Replies: 3
by Urge38 » 12 Aug 2025, 12:05

Hi Guys

need a little tec on the Lab-Craft ltd Model No DS 220d, more so, I am looking to know what the meter requires in hOms to read correctly.
My...

3 Replies

5806 Views

Last post by Cobra88
12 Aug 2025, 13:34
Westfalia Atlantic rear lights

Last post by TwinTurbo « 07 Aug 2025, 04:34
Replies: 3
by paradox » 25 Jul 2025, 09:12

Are these the original rear lights for a 1990 westfalia Atlantic?
They have a black plastic section between the lamp and number plate that other t...

3 Replies

18824 Views

Last post by TwinTurbo
07 Aug 2025, 04:34
MOT failure. Watch video, are my stop lights working?

Last post by syncropatrick « 05 Aug 2025, 20:47
Replies: 2
by syncropatrick » 05 Aug 2025, 10:45

Van failed MOT on offside stop lamp.
I think they’re working correctly.
Please watch the 1 minute video and comment.
Hella bulb holders.
Each...

2 Replies

5724 Views

Last post by syncropatrick
05 Aug 2025, 20:47
LED (DOT approved) Headlights

Last post by THE KESZTHELY KID « 05 Aug 2025, 12:25

by THE KESZTHELY KID » 05 Aug 2025, 12:25

Bueno Estente,

I have seen such as 7 inch LED headlights LAMP fit Land Rover Defender VW T25 T3 Vanagon sealed beam | eBay UK on Fleabay and...

0 Replies

8074 Views

Last post by THE KESZTHELY KID
05 Aug 2025, 12:25
Battery drained after long ride

Last post by TwinTurbo « 03 Aug 2025, 06:42
Replies: 9
by FarWare12 » 30 Jul 2025, 17:56

I've been experiencing some electrical issues. I drove about 5 hours with the van and the next morning, the van would not start. The voltage on the...

9 Replies

24564 Views

Last post by TwinTurbo
03 Aug 2025, 06:42
Heater issue

Last post by Oldiebut goodie « 31 Jul 2025, 07:54
Replies: 2
by aimlessrock » 30 Jul 2025, 23:09

Folks I’m working though my van and noticed that the heater control was not a VW switch.

I removed the glove box and found the heater wire goe into...

2 Replies

9714 Views

Last post by Oldiebut goodie
31 Jul 2025, 07:54
Faulty Fuel Gauge - Anyone Else Experiencing This?

Last post by FarWare12 « 30 Jul 2025, 17:46
Replies: 2
by gluquestr » 13 May 2025, 20:33

Hi all,
Just wondering if anyone else has had issues with their fuel gauge recently? Mine seems to be acting up - showing as almost empty even after...

2 Replies

7841 Views

Last post by FarWare12
30 Jul 2025, 17:46
Replacing the starter battery

Last post by Sadie110 « 28 Jul 2025, 18:03
Replies: 12
by patrickpawsey » 03 Jun 2020, 13:46

Hi everyone,

I am about to replace the starter battery in our 1990 1.9dg, as it's not holding charge any more (I had to disconnect the manifold...

12 Replies

9182 Views

Last post by Sadie110
28 Jul 2025, 18:03
Oil pressure light.

Last post by BarnyE « 26 Jul 2025, 15:00
Replies: 6
by BarnyE » 20 Jul 2025, 15:31

Is there a way to check my oil system is doing what it should be doing?

I only ask as my oil pressure light is now illuminating. Comes on with...

6 Replies

10158 Views

Last post by BarnyE
26 Jul 2025, 15:00
Location of 1.9 DG oil pressure switches

Last post by PaulFDennis « 19 Jul 2025, 11:35
Replies: 4
by PaulFDennis » 18 Jul 2025, 15:10

I’ve been working on the dash instrumentation on my 1.9 DG engined T25 (1990/91) and found the oil pressure warning LED was removed. On replacing the...

4 Replies

6077 Views

Last post by PaulFDennis
19 Jul 2025, 11:35
Electric mirors

Last post by paradox « 18 Jul 2025, 11:04

by paradox » 18 Jul 2025, 11:04

My Atlantic has electric mirrors but the control knob does nothing.
What fuse and or relay should I be checking first?

0 Replies

8358 Views

Last post by paradox
18 Jul 2025, 11:04
pre-1984 fusebox wiring

Last post by Robsey « 17 Jul 2025, 21:52
Replies: 26
by LisaB4 » 21 Jul 2022, 12:51
1

2
Does a simple diagram exist on what colour wire goes in what position on the old type fuse box? I've got a spaghetti mess and no idea what connects...
26 Replies

14994 Views

Last post by Robsey
17 Jul 2025, 21:52
Flashing Coolant LED

Last post by PaulFDennis « 16 Jul 2025, 09:51
Replies: 40
by Smiffo » 23 Mar 2025, 15:05
1

2

3
Afternoon all.

Scanned the pages already for ’the' good diagram ( there used to be a good one on Wiki, but that seems empty now. )

Problem as...
40 Replies

27653 Views

Last post by PaulFDennis
16 Jul 2025, 09:51
Tried everything I can think of, but still no spark

Last post by ajsimmo « 13 Jul 2025, 09:21
Replies: 7
by zegarek » 10 Jul 2025, 12:34

I'm not after advice for rekindling a marriage (right now), just want to get my T25 back on the road.

I'm at the very modest limits of my knowledge,...

7 Replies

7594 Views

Last post by ajsimmo
13 Jul 2025, 09:21
T25 dashboard dimmer switch

Last post by Mocki « 12 Jul 2025, 11:04
Replies: 6
by MandyJ » 11 Jul 2025, 07:25

Hello, first post, apologies for not knowing technical names for things.

My dad owns a T25 1985 Caravelle that he has maintained for over 20 years....

6 Replies

6064 Views

Last post by Mocki
12 Jul 2025, 11:04
Replace analogue clock with tachometer

Last post by TwinTurbo « 10 Jul 2025, 22:07
Replies: 6
by PaulFDennis » 09 Jul 2025, 11:19

Is it possible to simply replace the analogue clock in the dash with an original VG T25 tachometer? Physically obviously yes but does the wiring loom...

6 Replies

4882 Views

Last post by TwinTurbo
10 Jul 2025, 22:07
Thin blue wire

Last post by TwinTurbo « 09 Jul 2025, 21:15
Replies: 6
by dogbreath100 » 09 Jul 2025, 02:36

Hi , the thin blue wire coming from the alternator has broken on the connector block maybe a foot or so from the alternator. . I cut the block off...

6 Replies

3729 Views

Last post by TwinTurbo
09 Jul 2025, 21:15
Solar, MPPT, Zig CF6, 2nd battery compatibility, t25 2L CU

Last post by Lord-won't-you « 04 Jul 2025, 00:24
Replies: 4
by Lord-won't-you » 28 Jun 2025, 20:21

Hi, I have an '82 t25 2L CU high top camper with a zig CF6, only one starter battery, but there are the cables for the leisure battery (under...

4 Replies

3139 Views

Last post by Lord-won't-you
04 Jul 2025, 00:24
Fuel gauge warning mark. 1.9 petrol

Last post by Aidan « 01 Jul 2025, 12:38
Replies: 1
by RCN » 01 Jul 2025, 11:10

Does anyone know when the needle hits the yellow warning mark how many litres are left or how many miles are left until you hit empty? I never let it...

1 Replies

2911 Views

Last post by Aidan
01 Jul 2025, 12:38
Odometer Km to miles

Last post by Aidan « 28 Jun 2025, 11:16
Replies: 5
by Van Rouge » 28 Jun 2025, 06:53

Hi guys
Can I modify the existing speedo or should I source a clock in miles and set the mileage accordingly?
Many thanks in advance
Kind regards...

5 Replies

3109 Views

Last post by Aidan
28 Jun 2025, 11:16
Do I have a wrong headlight lens? (L/H drive)

Last post by Aidan « 27 Jun 2025, 08:02
Replies: 5
by NoobyNiall » 26 Jun 2025, 15:39

Replacing headlights and noted one of the headlights is different (old one) than the other (new one)
Should they be similar?

edited to show...

5 Replies

3124 Views

Last post by Aidan
27 Jun 2025, 08:02
Trickle charger recommendations

Last post by colinthefox « 26 Jun 2025, 14:09
Replies: 3
by Volchara » 26 Jun 2025, 07:08

Hi all, as the title says I’m looking for a trickle charger for my T3 to keep the battery topped up while it sits on the driveway. Anyone got any...

3 Replies

2523 Views

Last post by colinthefox
26 Jun 2025, 14:09
I've not got the horn

Last post by silverbullet « 26 Jun 2025, 07:46
Replies: 5
by silverbullet » 22 Jun 2025, 14:38

Come again? ;)

Final bits of the rebuild, added twin horns, thought that I should test them before adding the OEM relay arrangement.

Horns don't...

5 Replies

4295 Views

Last post by silverbullet
26 Jun 2025, 07:46
Does anyone know the operation of the DOPS module.

Last post by Robsey « 24 Jun 2025, 17:59
Replies: 1
by TwinTurbo » 24 Jun 2025, 13:14

Looking to re-create the DOPS.

Does anyone have a table of RPM vs Switch Status = Action?

Cheers

Rob

1 Replies

1612 Views

Last post by Robsey
24 Jun 2025, 17:59
Length of battery positive cable?

Last post by Aidan « 23 Jun 2025, 10:43
Replies: 4
by PaulF » 19 Jun 2025, 19:24

Hi, can anyone tell me the length and cross sectional area for the battery positive lead between battery and starter motor please?
I need to order a...

4 Replies

1860 Views

Last post by Aidan
23 Jun 2025, 10:43
Coil

Last post by Freddievan « 22 Jun 2025, 16:30
Replies: 6
by Freddievan » 27 Jan 2025, 14:17

I've had intermittent issues with ignition, which was traced to the coil connections. The connectors have been cleaned and tightened but the issue...

6 Replies

35650 Views

Last post by Freddievan
22 Jun 2025, 16:30
temp sender wiring

Last post by chrism589 « 19 Jun 2025, 21:03
Replies: 11
by Betty boop 1 » 27 Jun 2021, 17:38

can i start with an apology been quiet for a why as it looked like id been blocked.....thankfully and evidently not temp gauge doesnt work read a lot...

11 Replies

4737 Views

Last post by chrism589
19 Jun 2025, 21:03
Unexpected fuse in slot 3

Last post by cobblers « 18 Jun 2025, 11:29
Replies: 7
by Alfredo » 17 Jun 2025, 18:48

I have a 30A fuse in slot 3 of my fuse box, which according to all sources I can find show it as a 15A fuse?

My 12v cigarette lighter has been...

7 Replies

2617 Views

Last post by cobblers
18 Jun 2025, 11:29
Leisure Battery Wiring Mess.

Last post by maxstu « 16 Jun 2025, 07:59
Replies: 4
by maxstu » 14 Jun 2025, 15:33

12 volt wiring is not my strongpoint. But even this mess is worrying me. Can l use the busbar thingy instead. It's rated to 100 amps so should be...

4 Replies

1842 Views

Last post by maxstu
16 Jun 2025, 07:59
Identify late fan wiring harness

Last post by silverbullet « 09 Jun 2025, 19:16
Replies: 9
by silverbullet » 04 Jun 2025, 19:30

I recently acquired a box of mixed T3 wiring, I have worked out whats what, appears to mostly have come from a '89 Caravelle (going by resistor dates...

9 Replies

2659 Views

Last post by silverbullet
09 Jun 2025, 19:16
Replacement hazard switch

Last post by mariner « 07 Jun 2025, 19:51
Replies: 20
by Profscooter » 14 Nov 2022, 17:36
1

2
My D reg Autosleeper T25 has developed a faulty hazard light switch - only the right side of the van flashed. I ordered a new switch online which was...
20 Replies

5250 Views

Last post by mariner
07 Jun 2025, 19:51
Fixing high beams indicator

Last post by silverbullet « 04 Jun 2025, 19:35
Replies: 2
by Matt_CH » 03 Jun 2025, 14:12

Hi everyone, I just bought my first T25, it's a 1989 Kastenwagen .

One of the problems I had to fix was the broken high beams indicator bulb.
I...

2 Replies

1679 Views

Last post by silverbullet
04 Jun 2025, 19:35
T3 1.6td radiator fan resistor

Last post by Michael c « 01 Jun 2025, 15:01
Replies: 2
by Michael c » 01 Jun 2025, 11:16

Have a T3 1.6td . The radiator fan will only run on high speed when the engine is very hot . Should have 2 speeds. Suspect the resistor behind the...

2 Replies

1735 Views

Last post by Michael c
01 Jun 2025, 15:01
Dash lights.

Last post by BarnyE « 31 May 2025, 19:03

by BarnyE » 31 May 2025, 19:03

I did a stupid thing and put the battery feed to the “little black box” onto the negative terminal in an utter brain dead moment. The diode on the...

0 Replies

7917 Views

Last post by BarnyE
31 May 2025, 19:03
Full beam only on the offside

Last post by pierce « 31 May 2025, 06:59
Replies: 11
by pierce » 23 May 2025, 11:46

Hi when I click the full beam on I only get the right hand light and the near side headlight goes off

Any ideas, I have changed the headlight relay

11 Replies

3482 Views

Last post by pierce
31 May 2025, 06:59
Temperature Guage going to full

Last post by Smiffo « 30 May 2025, 17:15
Replies: 5
by Goose407 » 29 May 2025, 08:12

1.9 DG 1987. Have owned for 20 years. Temperature guage going to full and red light flashing Replaced temp sensor, replaced coolant level sensor...

5 Replies

2106 Views

Last post by Smiffo
30 May 2025, 17:15
T3 fuel gauge

Last post by silverbullet « 30 May 2025, 07:48
Replies: 2
by Komorebi » 29 May 2025, 05:07

Hi guys.
Firstly, electrical is really not my thing so bare with me.
My fuel gauge is playing games with me. When the fuel tank is completely full it...

2 Replies

1719 Views

Last post by silverbullet
30 May 2025, 07:48

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