156 - brake and sidelights problem - Alfa Romeo Forum
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(Post Link) post #1 of 5 Old 10-07-09 Thread Starter
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156 - brake and sidelights problem

First the brake lights went in quick succession. garage changed them both and they worke fine, but the fault light remained on. This was traced to the fact that even with no lights on, both rear sidelight lightbulbs were dimly lit (i seem to remember them saying that they were drawing 0.4V). When they tried to fix this, the problem moved to the front sidelight!
I have read some threads that imply that this might be the body CU?
Have had no other electrical problems on this car in nearly 150K. Any help assistance much appreciated.
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You don't have a body ECU, so it isn't that!!
It could be the revcounter though.
Or even just a poor earth somewhere.
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(Post Link) post #3 of 5 Old 10-07-09 Thread Starter
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Ta David, I have forgotten the term that i have seen on the other posts that cover failing lights on 147s. I did take the E out of the CU so that it didn't look quite so moronic
The garage couldn't find any earth leaks and the rev counter (and all other electrics) are working fine.. touch wood
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The rev counter can cause this issue as the bulb check circuit runs through it...
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Had the same problem with my 156. If the warning light comes on and the bulbs aren't replaced soon after it can cause the back of the rev counter to burn out. I also found out that the blubs don't have to have blown, one of my brake lights was on its way out and still caused the light to come on.
Another thing to note is that this fault can cause a rear bulb to remain on permanatly. This will be fixed by replacing the rev counter. You can pick one up for about 30.

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156 , brake , problem , sidelights

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