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Dodgy Gauges & Crusty wiring harness

To clarify - that's In Car Entertainment - not frozen water
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wapit247
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Dodgy Gauges & Crusty wiring harness

Post by wapit247 » Tue Apr 05, 2022 12:35 pm

Hi All,

So my car has been sitting for over a year and it did not like it.
I just got the timing belt, water pump & alternator replaced, however the gauges (Fuel/Temp /Clock) are now randomly flashing, see video:


So I removed the dash and circuit boards to check their condition, which all appeared fine however what I did not expect was the crusty wiring harness!, see:




Its seems the factory tape that supported the harness had crumbled to bits, I don't think this has caused the issue with the gauges. However I removed all the crusty stuff and checked the joins under the blue tape in case there was any corrosion. All seemed good so just for good measure I added some solder to each joint and re-covered with fresh tape., see:









Last edited by wapit247 on Tue Apr 05, 2022 1:57 pm, edited 1 time in total.
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Drax
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Dodgy Gauges & Crusty wiring harness

Post by Drax » Tue Apr 05, 2022 1:11 pm

blimey thats some crust! good work clearing it up though. the clocks random flashing is funky but understandably annoying :? have you plugged them back in just to see if sorting the tape etc has helped?
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wapit247
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Dodgy Gauges & Crusty wiring harness

Post by wapit247 » Tue Apr 05, 2022 1:55 pm

Hey @Drax Unfortunately once I put it all back to together it was still broken. I am beginning to wonder is it’s an earthing issue.
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Dodgy Gauges & Crusty wiring harness

Post by Drax » Tue Apr 05, 2022 3:11 pm

certainly check all your earths - i would also try and use a heater to dry the clock unit and if you can get one on an extension lead, get one going for a good while in the car - point it at the dash to try and dry out any damp
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Dodgy Gauges & Crusty wiring harness

Post by vanzep » Tue Apr 05, 2022 5:59 pm

You should also check the ecu in the passenger footwell as moisture can get in there. Maybe unplug the ecu and take it out and have a look at the board ;)
I had an issue with the temp/clock guage and replaced them - sometime later i removed the ecu and some years after that i had a look at the ecu and found what i believe caused the problem - one of the components in the ecu had burst - there was damp in the passenger footwell so maybe that was the cause - maybe not but the finger seems to point to the faulty component in the ecu. Took me years to arrive at this conclusion :)
I hate to ask but is there a fishy smell in your lude?

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you can see the faulty (burst component) and scorch mark on the backside of the board
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