71MonteCarloMD Posted July 18, 2018 Share Posted July 18, 2018 I tried to search the forum to find out why my "GEN" and "OIL" does not light up when put in ignition position - my horn, light in dash, blinkers works fine as I believe all my fuses are fine. I noticed that these lights stopped working after a shop rebuilt my 4 BBL carb as I did find oil sensor unplugged near distributor as I plugged it back - not sure if it was related or not at all? Where else should I look to fix the issue? Quote Link to comment Share on other sites More sharing options...
71MonteCarloMD Posted July 19, 2018 Author Share Posted July 19, 2018 I just remembered that the shop also re terminated the battery cable end at battery to improve cranking, would that be the issue? Quote Link to comment Share on other sites More sharing options...
71MonteCarloMD Posted July 21, 2018 Author Share Posted July 21, 2018 Found blown blub for temp but still no light to these 3 as I'm stumped guys, any idea? Quote Link to comment Share on other sites More sharing options...
Rob Peters Posted July 21, 2018 Share Posted July 21, 2018 Maybe instrument cluster circuit board. rob Quote Link to comment Share on other sites More sharing options...
71MonteCarloMD Posted July 22, 2018 Author Share Posted July 22, 2018 If there's light inside the cluster like fuel, mph and clock, does that means the circuit board is good or not? Quote Link to comment Share on other sites More sharing options...
monte70car Posted July 23, 2018 Share Posted July 23, 2018 Light would be good, but you can have copper traces that are burnt or broken which will cause the the lights not to work. Quote Link to comment Share on other sites More sharing options...
Rock Posted July 23, 2018 Share Posted July 23, 2018 My suggestion would be to ohm out the circuits. Visuals don’t give you the info you need. You can remove the the dash pad and get to the connector for the trace on the back of the dash. You can easily ohm out both and see if you have continuity to that point. If you do than the problem is behind the dash. Quote Link to comment Share on other sites More sharing options...
71MonteCarloMD Posted July 23, 2018 Author Share Posted July 23, 2018 Ert and Glen, thanks for your inputs as I'm no electrician, how would I ohm them to see if I get any feed? Quote Link to comment Share on other sites More sharing options...
Rock Posted July 24, 2018 Share Posted July 24, 2018 You are looking for continuity. So you would ohm out from the connector pin under the dash to the sensor. You should have a 0 ohm path. If you read anything above a short you have wiring issues or a fuse issue. I would suggest a wiring diagram and a good volt/ohm meter. You will get the pin out info off of that. The. If that’s good you might be able to get to the dummy lights and check continuity between them and the connector to the trace board. I had to do this when I had issues with my dash tach. Quote Link to comment Share on other sites More sharing options...
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