Electrical & Instrumentation

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Most liked posts	Author	Posted	Liked	Forum
Anyone know how to diagnose a faulty PCB	TwinTurbo	21 Nov 2025, 21:33	Once this week	Electrical & Instrumentation

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Last post

Pierburg carb part. 025906333

Last post by Boneyt25 « 18 Jul 2023, 21:26
Replies: 13
by maxstu » 17 May 2020, 18:05

This item comes off a Pierburg carb. It's some sort of a heater.
What does it actually do, and how do l test it off vehicle?
Regards
Stuart

13 Replies

4893 Views

Last post by Boneyt25
18 Jul 2023, 21:26
Coil

Last post by R0B « 16 Jul 2023, 12:45
Replies: 2
by kentishvanman » 14 Jul 2023, 07:22

Just a thought.
Does the coil performance lessen over the years? I look at mine and think 'that must be on the point of giving up'. It is the...

2 Replies

961 Views

Last post by R0B
16 Jul 2023, 12:45
Electrolux RM212

Last post by Rosie n' Jim « 12 Jul 2023, 16:59
Replies: 5
by paganmanwales » 11 Jul 2023, 11:58

I am looking for a wiring diagram for the fridge in the Holdsworth,but the links in the download section don't seem to work? Are they no longer...

5 Replies

1148 Views

Last post by Rosie n' Jim
12 Jul 2023, 16:59
radiator fan wiring

Last post by philmcC « 12 Jul 2023, 16:15
Replies: 2
by philmcC » 12 Jul 2023, 15:26

In the middle of replacing the radiator fan on my 2.1 W BX van. Have dropped radiator and removed the cowl . The wiring to the back of the old fan...

2 Replies

924 Views

Last post by philmcC
12 Jul 2023, 16:15
Lithium Batteries in Parallel Unequal Discharge

Last post by LeeME3 « 12 Jul 2023, 07:51
Replies: 4
by LeeME3 » 06 Jul 2023, 13:50

I have 2 Renogy 100Ah lithium batteries wired in parallel to bus bars. They work exactly as I'd expect and give slightly better performance than...

4 Replies

1290 Views

Last post by LeeME3
12 Jul 2023, 07:51
Isolation switch on diesel?

Last post by ZsZ « 11 Jul 2023, 16:31
Replies: 3
by Bryce » 11 Jul 2023, 15:20

I'm looking into fitting a isolation in my jx as it drains the battery (think it's the radio) after a couple of days.
I've got a one on the battery...

3 Replies

914 Views

Last post by ZsZ
11 Jul 2023, 16:31
Confusing wiring

Last post by Robsey « 09 Jul 2023, 13:37
Replies: 4
by AlBundy » 04 Jul 2023, 14:53

Please help, novice DIY electrical work going on. I am currently in process of removing the unnecessary wiring and fuse board / split charge relay,...

4 Replies

1109 Views

Last post by Robsey
09 Jul 2023, 13:37
Only getting 12 volts at the split charge relay.

Last post by ZsZ « 07 Jul 2023, 12:12
Replies: 3
by AlBundy » 07 Jul 2023, 08:56

Have tried the wiki and search, but not found (or not understood) if my issue is dealt with.

I have tested the output cable at the split charge...

3 Replies

1093 Views

Last post by ZsZ
07 Jul 2023, 12:12
Spark plug gap

Last post by mrhutch « 07 Jul 2023, 09:10
Replies: 3
by kentishvanman » 06 Jul 2023, 09:40

I have it written down somewhere but cannot find it.
Spark plug gap should be?????????? LPG running, 1.9DG, Green label coil.
Seem to remember it is...

3 Replies

903 Views

Last post by mrhutch
07 Jul 2023, 09:10
Sulphur smell after we start up

Last post by silverbullet « 01 Jul 2023, 20:25
Replies: 6
by BobbyOrbit » 29 Jun 2023, 16:29

Hi. A week ago, for no apparent reason, this started happening. We don't think it's the leisure battery as we stuck our noses in to check. Could be...

6 Replies

1261 Views

Last post by silverbullet
01 Jul 2023, 20:25
Alternator Help - VW T25 1983 1.9 Petrol

Last post by tandemsandy « 28 Jun 2023, 18:14
Replies: 2
by leni_kampa » 27 Jun 2023, 09:53

Hi All,
First time posting. My alternator isn't charging my van starting battery. On testing returning 1 or 2 volts back to it when (I think) I'm...

2 Replies

885 Views

Last post by tandemsandy
28 Jun 2023, 18:14
Starter Motor fault or is it?

Last post by djhammy « 27 Jun 2023, 08:35
Replies: 6
by djhammy » 18 Jun 2023, 21:00

Hi hoping you can help or advise. Took the T25 1.9 water cooled to Dorset for a few days on a camp site. We then planned to go onto Bath but after 4...

6 Replies

1193 Views

Last post by djhammy
27 Jun 2023, 08:35
Horn shorting with replacement indicator stalk

Last post by jacko1967 « 26 Jun 2023, 20:06
Replies: 3
by ianders » 22 Jun 2023, 17:07

Wondering if it's just a poor quality aftermarket part but I'm having some issues with the horn which has become a corner detector. Seems the slip...

3 Replies

891 Views

Last post by jacko1967
26 Jun 2023, 20:06
OEM ABS - Wiring Diagram and/or Service Manual?

Last post by maxstu « 25 Jun 2023, 08:48
Replies: 5
by ManicGTI » 15 Jun 2023, 13:51

Hi all, my 1990 2wd Van has factory PAS - I've just noticed that the ABS warning light doesn't come on at all.

It wasn't mentioned at MOT last year...

5 Replies

699 Views

Last post by maxstu
25 Jun 2023, 08:48
Westfalia 3 way fridge, water pump and test light not working

Last post by mioba « 24 Jun 2023, 14:11
Replies: 1
by Diesel02 » 06 Jun 2023, 05:59

I have just bought my first VW T25 Vanagon. It's from 1990 and runs like a dream.
Unfortunately, my 3-way refrigerator is not working. The same goes...

1 Replies

582 Views

Last post by mioba
24 Jun 2023, 14:11
Odometer / Speedo cable replacement

Last post by pleasestartnow « 21 Jun 2023, 12:52
Replies: 1
by JoséAhoy » 21 Jun 2023, 11:11

hi folks -

I'm going to attempt to fit a new oddo cable on our van soon as our speedo / odometer stopped working a good few hundred miles ago -...

1 Replies

491 Views

Last post by pleasestartnow
21 Jun 2023, 12:52
Cable size for second 'leisure' battery

Last post by stoneageman « 20 Jun 2023, 20:11
Replies: 12
by sweetaswesty » 03 May 2022, 09:50

I'm going to fit a second 'leisure' battery (so called) in the empty behind seat battery box and connect them in parallel with the live out going...

12 Replies

5725 Views

Last post by stoneageman
20 Jun 2023, 20:11
T25 Central locking fault

Last post by ManicGTI « 19 Jun 2023, 11:11
Replies: 3
by Bison535 » 17 Jun 2023, 14:43

Hi 80/90
My central locking system has stopped working and I need to get it fixed soonest.
I’m in Portsmouth on Monday traveling up to Lowestoft. Can...

3 Replies

645 Views

Last post by ManicGTI
19 Jun 2023, 11:11
temp gauge issue

Last post by Boneyt25 « 18 Jun 2023, 20:18
Replies: 12
by Brismike » 29 Jun 2021, 21:23

hi got a 1.9 watercooled on a 86 temp gauge has never worked so bridged at the thermostate but got nothing so replaced the clocks now bridged gauge...

12 Replies

2567 Views

Last post by Boneyt25
18 Jun 2023, 20:18
Not wrecking the van electrics when upgrading the leisure electrics

Last post by AlBundy « 16 Jun 2023, 13:49
Replies: 5
by AlBundy » 10 Jun 2023, 12:39

Hi everyone,

I have a 1986 t25, LHD bilbo conversion. The electrics are old and have been advised to update them to the Sargent EC155 PSU and...

5 Replies

834 Views

Last post by AlBundy
16 Jun 2023, 13:49
Headlights stopped working on low beam

Last post by Slaydog « 14 Jun 2023, 20:55
Replies: 4
by Slaydog » 08 Jun 2023, 12:33

Hi - I lost my dash lights and low beam the other eve. Checked for blown fuses and considered checking the relay but couldn’t find it. Fuses were...

4 Replies

728 Views

Last post by Slaydog
14 Jun 2023, 20:55
Small bulbs for 1982 van

Last post by AlexDal « 14 Jun 2023, 16:13
Replies: 11
by AlexDal » 31 May 2023, 09:54

My oil light doesnt come on when turning on the ignition so trying to replace the bulb (it's very small with 2 small wires/prongs coming off it)....

11 Replies

1322 Views

Last post by AlexDal
14 Jun 2023, 16:13
Temperature gauge not working

Last post by Welshclimber « 13 Jun 2023, 20:00
Replies: 10
by Welshclimber » 08 Jun 2023, 19:07

Hoping for some help 😅
The last two days the temperature gauge has started moving (it was pretty steady) and then started to drop. Has now dropped to...

10 Replies

1000 Views

Last post by Welshclimber
13 Jun 2023, 20:00
RCD Extension Lead on 24v Plug Point - ? Mad?

Last post by clift_d « 12 Jun 2023, 20:46
Replies: 1
by KimKimKim » 12 Jun 2023, 11:02

Hello, I did look in the Tech Archives - but nothing quite answered this question..

...After an electric hook-up - can you use a rcd 2 or maybe a 4...

1 Replies

530 Views

Last post by clift_d
12 Jun 2023, 20:46
Coil switch current rating.

Last post by gutmeg « 10 Jun 2023, 21:29
Replies: 3
by gutmeg » 10 Jun 2023, 20:33

Hi All, hope all fine with you all. A query please I would like to fit a switch to the coil supply cable, to enhance the security to the van.Does...

3 Replies

614 Views

Last post by gutmeg
10 Jun 2023, 21:29
Radiator fan not going off

Last post by Mocki « 10 Jun 2023, 21:24
Replies: 10
by Madgooner23 » 06 Jun 2023, 12:50

This seems to be an annual problem for me. Have a 1.9 diesel, first run out in the sun this weekend, fan won’t go off. Changed the thermo switch, no...

10 Replies

1233 Views

Last post by Mocki
10 Jun 2023, 21:24
Heater Motor fan not working. Quick fix

Last post by jrt « 05 Jun 2023, 20:39
Replies: 6
by Marine Engineer » 05 Jun 2023, 12:37

The heater fan stopped working on our T3 / 25 camper. I was advised it was a dashboard out and major strip down. This did not appeal on an old...

6 Replies

864 Views

Last post by jrt
05 Jun 2023, 20:39
Phillips radio

Last post by Robsey « 05 Jun 2023, 06:31
Replies: 2
by Oxford_Blue » 04 Jun 2023, 22:57

Hi all,

I have an old radio in the back of my van like this. First question, what do all the mlu buttons do? Assume medium/long wave etc but why are...

2 Replies

468 Views

Last post by Robsey
05 Jun 2023, 06:31
Ignition timing marks

Last post by sump « 03 Jun 2023, 09:31
Replies: 8
by sump » 27 May 2023, 11:07

Hi all,

I now have the DG running and it is sounding promising :ok

One question though! Putting the timing light on it yesterday and the timing...

8 Replies

899 Views

Last post by sump
03 Jun 2023, 09:31
Do gauge oil pressure

Last post by southernscouse « 03 Jun 2023, 09:18

by southernscouse » 03 Jun 2023, 09:18

Like a lot of others I have a couple of the Vdo gauges from a golf or Audi can someone recommend a sender unit for the oil pressure I know brickwork...

0 Replies

38661 Views

Last post by southernscouse
03 Jun 2023, 09:18
Ignition fault

Last post by MPORTO « 01 Jun 2023, 15:43
Replies: 1
by MPORTO » 26 May 2023, 16:08

Hello,

I'm new, not long bought a 1981 t25 2l air cooled. I have a weird fault, with the ignition on I could hear a clicking sound. I traced that...

1 Replies

467 Views

Last post by MPORTO
01 Jun 2023, 15:43
Alternator Voltage Regulator - for the win!

Last post by ZsZ « 30 May 2023, 04:39
Replies: 3
by ELVIS » 29 May 2023, 20:58

Fitted a new voltage regulator today on my tdi. Paid the grand sum of £12.24 for a febi one. Was 14.5 volt one and not 14v.

Was so excited I didn’t...

3 Replies

1069 Views

Last post by ZsZ
30 May 2023, 04:39
Oil pressure switch connections?

Last post by sump « 26 May 2023, 18:47
Replies: 6
by sump » 13 May 2023, 11:10

Hi.

Well Just connected everything back up after the engine swap and fitted the heat shield as recommended :oops:

Now we come to the wiring so I...

6 Replies

795 Views

Last post by sump
26 May 2023, 18:47
Rear heater fan not working in T3

Last post by Joe Wright « 25 May 2023, 20:55
Replies: 2
by Joe Wright » 25 May 2023, 12:57

Hello all. I have a T3 with a heater under the rear seats and a heater fan control dial on the dash. The fan isn't working. Fuse is fine. Broken...

2 Replies

477 Views

Last post by Joe Wright
25 May 2023, 20:55
Go westy hook up box connection issues!

Last post by ElevenSpots « 24 May 2023, 21:10
Replies: 3
by ElevenSpots » 23 May 2023, 22:18

Hi - help needed, pulling hair out.

Fixing up a westfalia t25 van -added new panels and cut holes for matching go westy electric, water and solar...

3 Replies

474 Views

Last post by ElevenSpots
24 May 2023, 21:10
Water temperature gauge and oil pressure switch

Last post by sump « 24 May 2023, 07:13
Replies: 4
by sump » 23 May 2023, 18:48

Puzzling over which wire goes where on my DG 1.9 engine. We took photo's of where each wire went and put them back as removed from the earlier engine...

4 Replies

566 Views

Last post by sump
24 May 2023, 07:13
oil pressure light on dash

Last post by gutmeg « 23 May 2023, 18:56
Replies: 19
by gutmeg » 04 May 2023, 17:52
1

2
1.9 petrol Holdworth villa 3 1984

HI all hope you all enjoy your bank holiday weekend. I would like some advice please . Van was laid up for winter...
19 Replies

3844 Views

Last post by gutmeg
23 May 2023, 18:56
Starter motor carbon brushes.

Last post by simonmarsh « 23 May 2023, 09:45
Replies: 3
by maxstu » 29 Jul 2019, 23:21

My local supplier in Margate has retired. Tried other venues but they want to rebuild for me and not supply parts. Anyone know of an old fashion shop...

3 Replies

1462 Views

Last post by simonmarsh
23 May 2023, 09:45
Water level sensor

Last post by AngeloEvs « 22 May 2023, 17:43
Replies: 6
by southernscouse » 19 May 2023, 12:04

Hi the red light is constantly flashing if I bridge the connection at the tank sensor it stops if I then turn off the ignition and start again light...

6 Replies

769 Views

Last post by AngeloEvs
22 May 2023, 17:43
Belt squeak. Alternator or glow plugs?

Last post by ZsZ « 21 May 2023, 13:48
Replies: 12
by ZsZ » 14 May 2023, 19:25

Recently my alternator belt started to squeak badly on startups (1Z m-tdi with the JX dual V-belt setup and 90A diesel alt.) So I went and changed...

12 Replies

1299 Views

Last post by ZsZ
21 May 2023, 13:48
Fuse no 7 on 12 fuse panel

Last post by TONYT25T25 « 18 May 2023, 20:53
Replies: 2
by TONYT25T25 » 18 May 2023, 20:05

Fuse no 7 had blown on fuse panel behind glove box. Thought this was cig lighter as that was not working, on replacing no7 fuse it did work. But...

2 Replies

454 Views

Last post by TONYT25T25
18 May 2023, 20:53
Quick question for electric gurus

Last post by ajsimmo « 18 May 2023, 20:46
Replies: 19
by southernscouse » 12 May 2023, 18:19
1

2
On the thermostat housing 2.1 dj there are two sensors one black one blue
I have the black towards the front of van and blue at the side is this...
19 Replies

1706 Views

Last post by ajsimmo
18 May 2023, 20:46
glow plugs issue

Last post by colinthefox « 14 May 2023, 18:32
Replies: 4
by muttleypup » 29 Apr 2023, 19:00

I recently had an issue where the glow plug relay would buzz on occasions (no starting issues cold or hot, just really annoying!).....switched to a...

4 Replies

766 Views

Last post by colinthefox
14 May 2023, 18:32
Reverse lights not working ! Help!!

Last post by herman_t25 « 13 May 2023, 18:39
Replies: 23
by herman_t25 » 10 May 2023, 16:50
1

2
Hi all,

Doing my final checks before the MOT tomorrow and the reverse lights aren’t working.

I’ve scoured the forum and checked so far

Bulbs....
23 Replies

2856 Views

Last post by herman_t25
13 May 2023, 18:39
Twin headlights - Switching between run and high

Last post by Robsey « 10 May 2023, 15:24
Replies: 5
by dickspanner » 09 May 2023, 20:15

Good evening everybody,

I am currently getting my crewcab ready for a MOT (now with a boring oil burner for those who know my crewcab the Cosworth...

5 Replies

744 Views

Last post by Robsey
10 May 2023, 15:24
westy kitchen lights

Last post by mioba « 09 May 2023, 22:05
Replies: 4
by fh9977 » 07 May 2023, 12:46

hi,
would anyone have instructions on how to convert the westy kitchen light into a 12v socket?

light on my fan is factory original: not very...

4 Replies

963 Views

Last post by mioba
09 May 2023, 22:05
Nsr indicator staying on

Last post by Robsey « 08 May 2023, 16:37
Replies: 5
by Pickles07 » 08 May 2023, 08:56

I have a fault with my rear ns indicator after I had to resolder my loom after I stupidly cut into it replacing my front panel it comes on with the...

5 Replies

674 Views

Last post by Robsey
08 May 2023, 16:37
Alternator and Starter rewire.

Last post by davidoft1 « 08 May 2023, 10:57
Replies: 6
by shepster » 08 May 2023, 07:24

I'm about to rewire the Alternator and starter circuit following the Wiki info and would just like to confirm something.

The 2 cables going from the...

6 Replies

709 Views

Last post by davidoft1
08 May 2023, 10:57
What size speakers?

Last post by fh9977 « 08 May 2023, 10:49
Replies: 14
by windydubber » 06 Mar 2015, 07:51

Hi,
What size speakers can you fit into the door cards? I am replacing the door cards so can cut fresh holes and fit new speakers!
Cheers

14 Replies

9176 Views

Last post by fh9977
08 May 2023, 10:49
Earth Strap

Last post by sauce1001 « 06 May 2023, 06:52
Replies: 7
by sauce1001 » 05 May 2023, 17:32

Hi all, I'm in the process of replacing my starter motor bush and I have this earth wire which I've found hanging. As per the pics, one end attached,...

7 Replies

1385 Views

Last post by sauce1001
06 May 2023, 06:52

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