Fuel and Temp sensor woes, what can i do

An alchemy of sparks, copper wire and earth

Moderators: Moderators, User administrators

Fuel and Temp sensor woes, what can i do

Postby crazyhorse » 13 Oct 2019, 21:39

Hi all,,

quick one. I have my dash hard wired, (made by midlifecrisis for me) but the voltage regualtor came off a while ago and I have been driving without temp and fuel gauge for a while now. Its the one in the hardwiring dash wiki.

After getting the van back from passing its MOT i decided to get the new regualtor in. Now I have manged to bugger it all up so I need a plan B. Put the regulator in, but it started get hot and smoke came... The dash lights still work but no temp sensor and fuel, and I dont want to do anything other to make it worse.

could I fit a seperate circuit for these 2, using the feeds from the loom, using 22 resistor and regulator splicing from 10v ignition and ground? I can follow the diagram in the wiki. Will it work?? Any suggestions before I make the move.

One last footnote, what size nut does the fuel gauge take, the one that holds the positive and negative at the back, mine has gone awol, and cant keep it on

thanks all
87 Transporter 1.9 WBX DG and LPG. In Maroon

http://www.guestwho.biz
crazyhorse
 
Posts: 696
Joined: 21 Aug 2013, 15:01
Location: Llantwit Major, Bro Morganwg, South wales
80-90 Mem No: 15202

Re: Fuel and Temp sensor woes, what can i do

Postby AngeloEvs » 14 Oct 2019, 12:34

Which 10v regulator did you fit? The input and output legs on most aftermarket TO type alternatives are reversed to the original TCY type used by VW.

You can dispense with the 22 ohm resistor it is not an essential component, pre 86 dashboards did not include it and the temp/fuel gauge circuit is identical.

The nuts are M4, I can send you some if you PM me your address.......no charge.
1987 DG Karisma LPG with remodelled interior
User avatar
AngeloEvs
 
Posts: 970
Joined: 22 Nov 2007, 19:22
Location: Upwell, Norfolk
80-90 Mem No: 4709

Re: Fuel and Temp sensor woes, what can i do

Postby crazyhorse » 14 Oct 2019, 18:24

AngeloEvs wrote:Which 10v regulator did you fit? The input and output legs on most aftermarket TO type alternatives are reversed to the original TCY type used by VW.

You can dispense with the 22 ohm resistor it is not an essential component, pre 86 dashboards did not include it and the temp/fuel gauge circuit is identical.

The nuts are M4, I can send you some if you PM me your address.......no charge.


I got the regulator off ebay as instructed in wiki. Middle is ground I presume, whats to worse that can happen if you wire them the wrong way round??

Noted with resistor, so I can run a seperate circuit to rest of stuff as I dont really want to mess with the board and wreck the one the working allbeit without two mentioned

PM sent regarding M4. much obliged. Love this place
87 Transporter 1.9 WBX DG and LPG. In Maroon

http://www.guestwho.biz
crazyhorse
 
Posts: 696
Joined: 21 Aug 2013, 15:01
Location: Llantwit Major, Bro Morganwg, South wales
80-90 Mem No: 15202

Re: Fuel and Temp sensor woes, what can i do

Postby crazyhorse » 02 Dec 2019, 16:56

Still no joy on this.

Not too sure if im putting the regulator the right way round. Is there a way to check?? Any advice
87 Transporter 1.9 WBX DG and LPG. In Maroon

http://www.guestwho.biz
crazyhorse
 
Posts: 696
Joined: 21 Aug 2013, 15:01
Location: Llantwit Major, Bro Morganwg, South wales
80-90 Mem No: 15202

Re: Fuel and Temp sensor woes, what can i do

Postby AngeloEvs » 02 Dec 2019, 20:16

Which regulator? Type number is printed on front

Many regulators will only function correctly with a capacitor across the output which is why I need the regulator type number.

If you have a multimeter you can measure the voltage at the guages themselves using the small centre nut of the temp gauge as a reference earth (0v) but make sure you have that centre but earthed. You should be getting around 10v d.c. on the other nuts
1987 DG Karisma LPG with remodelled interior
User avatar
AngeloEvs
 
Posts: 970
Joined: 22 Nov 2007, 19:22
Location: Upwell, Norfolk
80-90 Mem No: 4709

Re: Fuel and Temp sensor woes, what can i do

Postby crazyhorse » 02 Dec 2019, 22:04

cool.. thanks.

This is the info on the reg..

L7810cv
CC0kj v6
MAR 1712
87 Transporter 1.9 WBX DG and LPG. In Maroon

http://www.guestwho.biz
crazyhorse
 
Posts: 696
Joined: 21 Aug 2013, 15:01
Location: Llantwit Major, Bro Morganwg, South wales
80-90 Mem No: 15202

Re: Fuel and Temp sensor woes, what can i do

Postby AngeloEvs » 03 Dec 2019, 09:20

With the regulator face up (type data visible) and legs pointing south -

Left leg. Input
Centre Leg. 0v.
Right leg. Output


There must be a capacitor across the output to 0v, value is not critical.
1987 DG Karisma LPG with remodelled interior
User avatar
AngeloEvs
 
Posts: 970
Joined: 22 Nov 2007, 19:22
Location: Upwell, Norfolk
80-90 Mem No: 4709

Re: Fuel and Temp sensor woes, what can i do

Postby crazyhorse » 03 Dec 2019, 19:49

You lost me at capicitor...

Not sure where to go on this
87 Transporter 1.9 WBX DG and LPG. In Maroon

http://www.guestwho.biz
crazyhorse
 
Posts: 696
Joined: 21 Aug 2013, 15:01
Location: Llantwit Major, Bro Morganwg, South wales
80-90 Mem No: 15202

Re: Fuel and Temp sensor woes, what can i do

Postby AngeloEvs » 03 Dec 2019, 21:04

I can send you a capacitor with small eyelet tags soldered onto it and instructions regards fitting it to the nuts that secure the temperature gauge. Very simple to do but I am wondering if you have other errors that could be causing your problems.

The best way to tackle any issues with the dash instrumentation is to have it on a bench and test each function. Pity you are so far away as I would be happy to correct any problems.
1987 DG Karisma LPG with remodelled interior
User avatar
AngeloEvs
 
Posts: 970
Joined: 22 Nov 2007, 19:22
Location: Upwell, Norfolk
80-90 Mem No: 4709

Re: Fuel and Temp sensor woes, what can i do

Postby crazyhorse » 03 Dec 2019, 22:12

Defo, pretty much opposite parts of the UK.

I reckon you could be right about probs.

Dash is hardwired as displayed in wiki. All was fine till the regulator legs broke. I thought it would be just a case of sticking a new reg in. The biggest problem now is with soldering and removal of old reg and various things the board is looking worse for ware and some of the copper tracks are looking a bit suspect.

On the plus side all indicators and light work, battery, not sure about oil, but it does light up and go out once engine starts.
87 Transporter 1.9 WBX DG and LPG. In Maroon

http://www.guestwho.biz
crazyhorse
 
Posts: 696
Joined: 21 Aug 2013, 15:01
Location: Llantwit Major, Bro Morganwg, South wales
80-90 Mem No: 15202


Return to Electrical & Instrumentation

Who is online

Users browsing this forum: No registered users and 15 guests