Electrical & Instrumentation

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Most liked posts	Author	Posted	Liked	Forum
Dashboard PCB Replacement (CJH Design)	The Hairy Camper	10 Mar 2026, 21:47	Once this week	Electrical & Instrumentation

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Last post

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

2127 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

36183 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

5312 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

2963 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

2107 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

2967 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

5994 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

1848 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

1910 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

16934 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

3854 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

2394 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

1874 Views

Last post by silverbullet
30 May 2025, 07:48
Connector for coolant sensor missing - please help

Last post by radiostar « 15 May 2025, 17:04
Replies: 20
by radiostar » 05 May 2025, 10:29
1

2
Hi there, I hope you can help me..
I have a 1988 vwt25. I am trying to get back on the road and it’s not far off.
2 things I need help with and they...
20 Replies

7454 Views

Last post by radiostar
15 May 2025, 17:04
JPT Terminal Extraction Tool

Last post by Oldiebut goodie « 14 May 2025, 16:28
Replies: 8
by Alfredo » 13 May 2025, 12:23

Why are these so expensive?

Any tips for a Heath Robinson DIY version

8 Replies

4203 Views

Last post by Oldiebut goodie
14 May 2025, 16:28
1.9 TD AAZ LHD Carthago washer bottle motor

Last post by jacko1967 « 14 May 2025, 15:34
Replies: 2
by jacko1967 » 14 May 2025, 10:35

Hi my washer bottle motor has failed I've checked it on a spare battery and nothing. It was bought about a year ago from brickworks, the van was...

2 Replies

2720 Views

Last post by jacko1967
14 May 2025, 15:34
Engine bay wiring dilema - SORTED

Last post by Dueller « 14 May 2025, 15:30
Replies: 33
by Dueller » 07 Apr 2025, 20:33
1

2

3
Been busy with my van conversion, gearbox and engine, see my other threads

Now at the stage where i am connecting up

Have some questions though...
33 Replies

15101 Views

Last post by Dueller
14 May 2025, 15:30
Speedometer, fuel gauge, temp gauge not working

Last post by Robsey « 13 May 2025, 19:04
Replies: 10
by FarWare12 » 22 Jan 2024, 20:41

Hi. I recently bought a T25 and the speedometer, odometer, fuel gauge and temp gauge are not working. The warning lights do work.

Could this be one...

10 Replies

8199 Views

Last post by Robsey
13 May 2025, 19:04
Speedo Needle Return Spring

Last post by Aidan « 12 May 2025, 09:46
Replies: 1
by mshaw1980 » 09 May 2025, 19:54

Hello

Been a while since I posted with one thing or another but now back into some spannering on my van.

I previously had a noisy speedo which I...

1 Replies

3066 Views

Last post by Aidan
12 May 2025, 09:46
Vw T25 1980 odometer gear

Last post by R0B « 12 May 2025, 09:44
Replies: 3
by richardhyatt » 12 May 2025, 08:52

good morning,
new to the forum , so hope I have done this correctly
1980 2.0 litre Aircooled T25
my son has the above T25 and the odometer has...

3 Replies

2640 Views

Last post by R0B
12 May 2025, 09:44
No Rear Indicators or Brake Lights - SORTED

Last post by Smiffo « 12 May 2025, 08:40
Replies: 10
by Dueller » 06 May 2025, 17:25

Getting through things and now this

Got a spare earth wire, no idea where it goes

Did have a loose earth on the hazard switch that I repaired...

10 Replies

4451 Views

Last post by Smiffo
12 May 2025, 08:40
Sudden electrical death of washers, wipers, and heater fan.

Last post by Mocki « 12 May 2025, 06:11
Replies: 15
by rollercoaster » 10 May 2025, 17:53
1

2
So it was working recently and all at once not.
Checked the fuses 11 and 13, late van..
Earth crowns look fresh but I'll give them a wiggle.
Any tips...
15 Replies

6453 Views

Last post by Mocki
12 May 2025, 06:11
Wire fallen off back of early T25 fusebox not sure where it goes

Last post by Howardmsmith « 11 May 2025, 11:55
Replies: 3
by Howardmsmith » 09 May 2025, 21:07

21

I have a fairly heavy gauge solid green wire fallen off the back of an early 1983 type 25 fuse box. It think it may have come from fuse position...

3 Replies

3017 Views

Last post by Howardmsmith
11 May 2025, 11:55
Charge light on faintly at low revs

Last post by Aidan « 09 May 2025, 11:59
Replies: 1
by andyk » 09 May 2025, 09:44

Alternator drive belt has just been changed and now the charge light on the dash comes on faintly at low revs. Belt is on tight. Changed the voltage...

1 Replies

2668 Views

Last post by Aidan
09 May 2025, 11:59
Dashboard illumination lights

Last post by AlBundy « 06 May 2025, 20:16
Replies: 17
by AlBundy » 29 Apr 2025, 14:20
1

2
Drove the van at night for the first time in a while, and everything worked, except the dashboard illumination lights. They both used to work, now...
17 Replies

8947 Views

Last post by AlBundy
06 May 2025, 20:16
Ignition coil

Last post by Welshclimber « 06 May 2025, 16:34
Replies: 18
by Welshclimber » 04 May 2025, 08:25
1

2
Looks like my ignition coil is knackered as the ohms aren’t in-line with the spec that they should be. I need the pin type with the grey sticker....
18 Replies

6892 Views

Last post by Welshclimber
06 May 2025, 16:34
Electrical pin release tools

Last post by silverbullet « 06 May 2025, 12:39
Replies: 8
by silverbullet » 28 Apr 2025, 11:03

Recommendations please. I've tried the Durite hexagonal ones (6 tools) and they are poor.
I need tubular ones as well as straight/flat type.
Quality...

8 Replies

5941 Views

Last post by silverbullet
06 May 2025, 12:39
Fridge trips breaker

Last post by EmLu « 04 May 2025, 19:45
Replies: 4
by EmLu » 04 May 2025, 09:45

Good morning guys,

I have recently bought a T25 and thought I would see if the fridge works, when I attached the van to an Electric Hook Up I turned...

4 Replies

3753 Views

Last post by EmLu
04 May 2025, 19:45
3 pin connector underneath alternator

Last post by burnzdog « 04 May 2025, 18:39
Replies: 5
by burnzdog » 02 May 2025, 20:23

Hi all, need to try and replace a cable that comes from rear side of engine bay and connects two a 3 prong connector that appears to go into the...

5 Replies

4405 Views

Last post by burnzdog
04 May 2025, 18:39
Starter ampage

Last post by Robsey « 04 May 2025, 18:27
Replies: 3
by Marmalade67 » 03 May 2025, 15:54

Needing to replace ring connector to solenoid but what amp is required.

3 Replies

4476 Views

Last post by Robsey
04 May 2025, 18:27
Numberplate lamp surrounds, fitting

Last post by Robsey « 02 May 2025, 09:58
Replies: 2
by silverbullet » 01 May 2025, 18:19

Its been so long since I took these off, bought new ones from Brickie, defo bus/van not truck parts.

Do they just clip into place? I don't want to...

2 Replies

3710 Views

Last post by Robsey
02 May 2025, 09:58
Trooper solar panels fittment.

Last post by R0B « 01 May 2025, 19:41
Replies: 5
by KOTSY » 01 May 2025, 09:45

Hi everyone, not sure if this should be on this forum so sorry if not.
I have a 1990 1.6 TD and would like to fit solar panels to the roof. As the...

5 Replies

4180 Views

Last post by R0B
01 May 2025, 19:41
Hazard wiring

Last post by newkid « 29 Apr 2025, 14:39
Replies: 2
by newkid » 28 Apr 2025, 15:53

Anyone able to tell me what this pink spare wire is from. It's a thinner cable than the one that actually goes to the plug.

2 Replies

4404 Views

Last post by newkid
29 Apr 2025, 14:39
Engine bay junction box fixings

Last post by silverbullet « 28 Apr 2025, 10:59
Replies: 7
by silverbullet » 26 Apr 2025, 13:44

What size/type fixings should secure it to the body? I have three holes just under 5mm diameter, tried what looks like the correct size self tapper...

7 Replies

7851 Views

Last post by silverbullet
28 Apr 2025, 10:59
What does this wire do and where does it belong?

Last post by Robsey « 27 Apr 2025, 20:35
Replies: 8
by SyncroMatt » 25 Apr 2025, 21:50

Evening help please!

I was looking for a permanent live for my radio and moved the fuse box for access.

I spotted this black wire circled in red,...

8 Replies

6624 Views

Last post by Robsey
27 Apr 2025, 20:35
ZIG unit, no 12v on battery.

Last post by TwinTurbo « 27 Apr 2025, 19:44
Replies: 5
by TwinTurbo » 19 Apr 2025, 16:19

Bit of an odd one with my ZIG CF8

On mains the 12v's work, but with the mains disconnected no 12V works. It was fine in octover. I have 12V at the...

5 Replies

4502 Views

Last post by TwinTurbo
27 Apr 2025, 19:44
Odd Part on Engine Bay Relay

Last post by Robsey « 26 Apr 2025, 20:30
Replies: 3
by Robsey » 26 Apr 2025, 15:25

Hi All,

I have been going through one of my old van donor looms that I have had for ages.

Possibly from a now defunkt seller Water Wagons.
Not 100%...

3 Replies

4244 Views

Last post by Robsey
26 Apr 2025, 20:30
VDO cruise control

Last post by MarcoT3 « 18 Apr 2025, 15:50
Replies: 2
by MarcoT3 » 16 Apr 2025, 16:31

Hi,

Does anyone else have the VDO tempostat cruise control? It looks like a factory installation on my van.

Thanks

2 Replies

4238 Views

Last post by MarcoT3
18 Apr 2025, 15:50
Starting Issues electrical fault

Last post by Willsk « 11 Apr 2025, 16:49
Replies: 4
by Willsk » 04 Apr 2025, 11:44

Hi

I’m based in Leicester and am having issues starting my van (1981 1.6 diesel westfalia)
I’m really struggling to find the route cause of this...

4 Replies

4927 Views

Last post by Willsk
11 Apr 2025, 16:49
Sink Tap T25 1990

Last post by maxstu « 10 Apr 2025, 18:45
Replies: 2
by msvs » 07 Apr 2025, 13:10

Hi there first post so be kind please ! We have a 1990 T25 California, LHD import. Had it for 8 years and the sink tap has never worked. Finally got...

2 Replies

4263 Views

Last post by maxstu
10 Apr 2025, 18:45
Android head unit constantly on

Last post by Alfredo « 08 Apr 2025, 08:21
Replies: 12
by Alfredo » 07 Apr 2025, 16:14

I have spoken about this issue over on the what have you done to your van today thread but I thought it would be better to start a new thread.

I...

12 Replies

6799 Views

Last post by Alfredo
08 Apr 2025, 08:21
starter motor issues

Last post by Robsey « 01 Apr 2025, 22:29
Replies: 7
by Plasticman » 01 Apr 2025, 20:21

I have a G reg Auto homes (petrol) with a starter issue,

Turn the key all lights come on as they should but starter doesnt engage, I can hear a...

7 Replies

7242 Views

Last post by Robsey
01 Apr 2025, 22:29
Only running on 2 pots

Last post by Robsey « 01 Apr 2025, 22:18
Replies: 3
by Plasticman » 01 Apr 2025, 20:38

The other problem with the G reg petrol van is running....

Starts great (with jump switch to solenoid) but only runs on two pots, the front pairs...

3 Replies

4896 Views

Last post by Robsey
01 Apr 2025, 22:18
Reading VW wiring diagram

Last post by Robsey « 24 Mar 2025, 20:52
Replies: 10
by MarcoT3 » 22 Mar 2025, 14:14

Hi guys, on the top of the VW wiring diagram there is a line marked 31. In the wiki it says this is ground. Am I right in assuming this is a ground...

10 Replies

30652 Views

Last post by Robsey
24 Mar 2025, 20:52
A4 +ve?

Last post by MarcoT3 « 24 Mar 2025, 19:12
Replies: 6
by MarcoT3 » 22 Mar 2025, 21:33

Hi all, does anyone know where the A4 positive in dash wiring loom noted below is in reality in the van? Thanks :D

6 Replies

13160 Views

Last post by MarcoT3
24 Mar 2025, 19:12
Temp gauge issue

Last post by TwinTurbo « 22 Mar 2025, 17:39
Replies: 6
by Africatwin » 21 Mar 2025, 18:54

Sorry admin. Originally posted in “mechanical” but it’s moved on to an electrical I think.

This is the original post

Evening all.

Newly acquired...

6 Replies

29407 Views

Last post by TwinTurbo
22 Mar 2025, 17:39
No Main Beam - no Blue LED

Last post by MarcoT3 « 22 Mar 2025, 14:19
Replies: 2
by trentjim » 21 Mar 2025, 14:21

noticed last night that i had a problem with the lights...
ive not really investigated yet but first impression is that dip is working but main beam...

2 Replies

16703 Views

Last post by MarcoT3
22 Mar 2025, 14:19
Buzzing, but not in a good way.

Last post by AlBundy « 20 Mar 2025, 16:44
Replies: 14
by AlBundy » 19 Mar 2025, 13:51

1.6 Diesel 1986 Bilbo Conversion.

I haven't been able to start the engine, and have narrowed the issue down to the box at the back left of the...

14 Replies

60598 Views

Last post by AlBundy
20 Mar 2025, 16:44
Headlamps improvements

Last post by Alfredo « 18 Mar 2025, 18:32
Replies: 35
by Simon Baxter » 14 Feb 2025, 15:24
1

2

3
How do.
A customer recently asked us is we had any headlamp relays kits to which the answer was no, too many variables for us but we do have all the...
35 Replies

100096 Views

Last post by Alfredo
18 Mar 2025, 18:32
Early van / electrics, intermittent wiper relay?

Last post by Jay Goll « 15 Mar 2025, 23:13
Replies: 13
by bmouthboyo » 01 Aug 2018, 19:20

Hi Guys,

I have an early 83 van, originally a DG which has the old electrics with ceramic fuses etc.

Is it possible to easily upgrade the wipers so...

13 Replies

38376 Views

Last post by Jay Goll
15 Mar 2025, 23:13

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