ERA 427 S/C turn signals
My ERA has the 4 tail light setup. I had to remove them to have some rear fender damage repaired and after I reinstalled them the driver side rear turn signals don't work. The passenger side work fine.
All the other functions of the lights are working, marker and brakes and the front turn signal also works. Putting a voltmeter on the yellow leads on the driver side gives me a slightly lower voltage reading than on the passenger side. I swapped one of the fully functioning tail lights from the passenger side to the driver side with no luck. As near as I can tell there is a voltage drop on the driver side. Voltage on the passenger side shows about 10V and the driver side about 8V. Pretty hard to get a decent read with a digital VM when the power is only there for the cycle time from the flasher. Looking at the wiring diagram leads me to believe that the voltage drop may be coming from the tail light relay. I'd like to replace it but not sure how to remove it. Is it a plug in module or is it wired in? Can't really get a good look at it as it seems to be mounted above the 2 fuses in the holder under the steering column. Has anyone every replace the tail light relay on a 427 and if so how did you do it? Any suggestions would be appreciated. DonC |
Check this thread, it has part numbers and pics. http://www.clubcobra.com/forums/era-speak-bob-putnam/83980-trailor-resistor.html You might try switching the output wires to see if the problem then flips to the other side of the car or stays on the driver's side.
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You have a ground problem. Check your ground.
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ERA 427 turn signal
I agree with bad groumd which is usually the case with any vehicle when only one turn signal light does not function properly when the light bulb is good!
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Patrick:
Thanks for the information and references. Hope it will be straight forward from here. RE: Ground. Triple checked the wiring ground and used a frame pick off as an alternate so I was absolutely sure the ground was good. DonC |
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Patrick:
Thanks for the idea. I'll give it a try today before I drive myself crazy running all over town looking for the relay and let you know. DonC |
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Also, check the 9-pin connector at the left side of the driver's footbox. Pay special attention to the male and female pins associated with the yellow wire.
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Again, many thanks. I'll let you know.
DonC |
What will be cool is if, with the jumpers affixed, you signal a left turn and your front driver side signal blinks but no rear lights blink at all but when you signal a right hand turn the front passenger side signal blinks and the rear driver side signal blinks.
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Ground problem. You have to check ground continuity at the bulb contact. You cannot just verify the ground wire is attached. Taillights are finnicky about the grounds. The lower voltage on one circuit is due to the higher resistance (due to a poor ground) in that circuit, so you have a lower voltage. Your poor ground may be in the socket, so you must check the ground circuit with an ohmmeter. Anything more than about 0 will be problematic. Good luck finding your ground problem!
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Patrick:
With the jumpers in place the previously dead driver side rear turn signals function normally and the previously normally functioning passenger side is dead. I am guessing that this would indicate a bad relay. Is that your conclusion? DonC |
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I stand corrected... and amazed. Seen this a million times and always found a ground issue (especially when the problem showed up right after someone worked on it).
PatrickT - I've never put much creedance into your commentary before. Your stock ticked-up in my book just a bit from this... but only on wiring issues :) |
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Patrick:
Got 12V coming out of the 9 pin connector yellow wire to the relay and nothing coming out of the yellow wire from the relay. Next question, does anyone know where the heck I can get a new relay. Tried a web search for Standard Motor Parts TC52 from about 5 different angles with no luck. Also tried the two alternate units mentioned by Bob P in the other linked post and no luck. DonC PS: Sorry it took me so long to get back to you but the site went down and I had go get out to the store before too much more snow came down. |
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Thanks. I'll give Bob a call tomorrow and try to remember to to say sir.
Again, I really appreciate the assist and your time. DonC |
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