Rear Harness Wiring Diagram

Rear Harness Wiring Diagram

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Discussion

ukkid35

Original Poster:

6,217 posts

175 months

Tuesday 3rd May 2022
quotequote all
I'm using this to double check the the wiring to J53 - Ignition Control Unit

http://www.tvr-cerbera.co.uk/WorkshopWiringDiagram...

I can't make out the wire colours for A1 and B1, can anyone confirm?

Polly Grigora

11,209 posts

111 months

Tuesday 3rd May 2022
quotequote all
You're certainly having much fun with electrics recently

A1 - Red

B1 - White


ukkid35

Original Poster:

6,217 posts

175 months

Tuesday 3rd May 2022
quotequote all
Polly Grigora said:
You're certainly having much fun with electrics recently
Thank you much appreciated

I lost my headlights on the way back to the UK ten days ago, and I'm still trying to work out what caused that

When I checked the other control boxes I found more problems

ukkid35

Original Poster:

6,217 posts

175 months

Tuesday 3rd May 2022
quotequote all
I've now checked the Light Switching Unit, and relay RL2 looks like it's overheated, or failed in some way

The symptoms are that the relay oscillates such that the main bean flickers

Full beam is fine, as are all other lights

Is there anyway to remove the glue on the back of the board so the relays can be replaced/swapped?

Any other suggestions for a quick temporary fix?


Byker28i

61,608 posts

219 months

Tuesday 3rd May 2022
quotequote all
The stitched version is good to follow. If you can't read the wire colours one end, follow to the other end. That file size looks small?

any better
http://nineelmsphotography.com/images/CEPD003C%20R...

Edited by Byker28i on Tuesday 3rd May 15:48

ukkid35

Original Poster:

6,217 posts

175 months

Tuesday 3rd May 2022
quotequote all
Byker28i said:
Yes that's great thanks

Byker28i

61,608 posts

219 months

Tuesday 3rd May 2022
quotequote all
No probs - shout if you need others

ukkid35

Original Poster:

6,217 posts

175 months

Tuesday 3rd May 2022
quotequote all
I found that Carb Cleaner (not brake cleaner) was pretty good when removing the adhesive





I reflowed the solder on both sides for the +ve feed that is clearly stressed



Then I left the headlights on for 90 mins or more



And I tried upsetting the control box, but it was totally stable for 90 mins or more

Also three were no hotspots, everything felt fine

Maybe it's fixed?

I've also bought a couple of the relays, but they're due to be delivered to my hotel in Gernany in a few days time

Byker28i

61,608 posts

219 months

Wednesday 4th May 2022
quotequote all
Dry joints then do you think?

ukkid35

Original Poster:

6,217 posts

175 months

Wednesday 4th May 2022
quotequote all
Byker28i said:
Dry joints then do you think?
The heat generated by the poor connection on the +ve feed had definitely made the solder look cloudy

Polly Grigora

11,209 posts

111 months

Thursday 5th May 2022
quotequote all
ukkid35 said:
I found that Carb Cleaner (not brake cleaner) was pretty good when removing the adhesive





I reflowed the solder on both sides for the +ve feed that is clearly stressed



Then I left the headlights on for 90 mins or more



And I tried upsetting the control box, but it was totally stable for 90 mins or more

Also three were no hotspots, everything felt fine

Maybe it's fixed?

I've also bought a couple of the relays, but they're due to be delivered to my hotel in Gernany in a few days time
Nice fix

ukkid35

Original Poster:

6,217 posts

175 months

Sunday 8th May 2022
quotequote all
Relays are made be TE Connectivity, but I doubt that makes a difference

No need to replace any of them at the moment anyway

Good value at €10 in p&p for two


Polly Grigora

11,209 posts

111 months

Sunday 8th May 2022
quotequote all
Cheap as chips

Juddder

858 posts

186 months

Monday 13th May
quotequote all
Byker28i said:
The stitched version is good to follow. If you can't read the wire colours one end, follow to the other end. That file size looks small?

any better
http://nineelmsphotography.com/images/CEPD003C%20R...

Edited by Byker28i on Tuesday 3rd May 15:48
The quality on that scan is much higher than the ones from http://www.tvr-cerbera.co.uk - @byker28i do you have the other ones in the same high res as it would be super handy to have those too - especially for me Rear Harness Part 2

Many thanks

Alex