Question about 1988 Chevrolet C/K 3500

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No shift or gauges on 92 Chevy 454

We have a 1992 Four Winds motorhome with chevy 454 engine. Drove great, no problems, til we took out old stereo and put in new one. Now none of the dash gauges work, and the transmission won't shift. We shorted something out, but not a fuse, checked and are all good. Really need schematics for wiring, so we don't have to follow every wire. Got an answer, or the schematics?Thanks

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I would first look at the main harness going to your ecm(engine control module) there is a 60 pin connector the bolt that hold the connector is a 10 mm remove the bolt and remove the connector it should be clean with no burn marks to show signs of a short. if there are burn marks not only must you replace the connector but you fried the ecm as well and that needs replacing. also check your relays. often times even though you don't blow a fuse the relay still may short out. this is a good place to start. let me know the results

Posted on May 17, 2009

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