i have a 1975 t-top vette i have a frame off and i have a bad electrical problem for the past three years every once in a while you would get into car and it would be dead no lites or anything after i done a frame off and rebuilt everything i thought thr problem would be solved but most of the time it is completely dead i even put in new engine wiring harness please somebody help me Keith

i have a 1975 t-top vette i have a frame off and i have a bad electrical problem for the past three years every once in a while you would get into car and it would be dead no lites or anything after i done a frame off and rebuilt everything i thought thr problem would be solved but most of the time it is completely dead i even put in new engine wiring harness please somebody help me Keith


The only thing you can do to find an annoying drain is put an ammeter between the battery's PLUS post and the terminal end and see how much of a drain you have (in amperes). Then start pulling your fuses one at a time until the drain suddenly stops. Then it'll be on THAT fuse's circut where your drain is coming from. If you have a wiring diagram, see what different things that fuse powers. And as relays often stick, try removing the hot wire from each relay and see if that stops your drain. I recently had an annoying drain until I happened to walk behind my car one day. The stoplights were on! It ended up being a miss-adjusted stoplight switch causing my drain.

i dont have a drain the battery never goes dead i thought the door switches were the problem we held both switches in and it started i started to bypass switches and it is back to the same when it goes dead i loose everytging once in a while the dome lite will come on real dim like it is a bad groiund it has almost whiped me the book i have the wiring diagrahm is not very good and i think that might be a problem

i dont have a drain the battery never goes dead i thought the door switches were the problem we held both switches in and it started i started to bypass switches and it is back to the same when it goes dead i loose everytging once in a while the dome lite will come on real dim like it is a bad groiund it has almost whiped me the book i have the wiring diagrahm is not very good and i think that might be a problem
when you restored did you connect a ground cable from engine to frame it wont ground properly thru rubber mounts

when you restored did you connect a ground cable from engine to frame it wont ground properly thru rubber mounts


You also need a ground strap to the car's steel framework that surrounds the cabin.

all grounds are prooerly connected and i said i had this problem before i restored tjis vette and i replaced engine compartment because someone had installed a kill switch in this harness and i thought it caused the problem but now i'm looking for bad relays or bad wire connectors and i just cant put my hand on the problem that why i was wondering if there is a really good wiring schematic that would show all circuts and relays and grounds thanks for all replys Keith

all grounds are prooerly connected and i said i had this problem before i restored tjis vette and i replaced engine compartment because someone had installed a kill switch in this harness and i thought it caused the problem but now i'm looking for bad relays or bad wire connectors and i just cant put my hand on the problem that why i was wondering if there is a really good wiring schematic that would show all circuts and relays and grounds thanks for all replys Keith
is it the same starter solenoid as before all elect power has to come from there

yes it is the same starter and selenoid and when it does start it cranks easy and starts up fine when i done frame off i had the complete running gear done motor and all exhust everything done and the engine would start and run fine when i put body back on is when this problem came back the other day two friends came over both of us held door switches in and the other guy started car started so i figured door switches were bad well the next day i tried it and back to same thing again it acts like a ground some times the dome lite comes on dim and some times when you turn ingition switch on left turn sig lite in dash comes on but i cant imagine not having a good ground i;m going out now and pull all fuses and make shure they all have good contact thanks and if you have any sugestion please let me know Keith

yes it is the same starter and selenoid and when it does start it cranks easy and starts up fine when i done frame off i had the complete running gear done motor and all exhust everything done and the engine would start and run fine when i put body back on is when this problem came back the other day two friends came over both of us held door switches in and the other guy started car started so i figured door switches were bad well the next day i tried it and back to same thing again it acts like a ground some times the dome lite comes on dim and some times when you turn ingition switch on left turn sig lite in dash comes on but i cant imagine not having a good ground i;m going out now and pull all fuses and make shure they all have good contact thanks and if you have any sugestion please let me know Keith
electrical problems are a bitch to track down maybe you pinched a wire when bolting back on i know mine occassionally ,one thing or another stops working usually is just corrosion on a fuse it very humid here good luck let us know when you solve the mystery

I had a similar problem on my 76. Turned out to be the factory alarm circut. Disco'd it, problem solved.

i beleive it is probally in the alarm system but i'm not shure how to bypass it when i thought it was in the door switches i tried to by pass them and it did not do anything is there a relay in the alarm system or where do i start it has a switch on hood and both doors doyou leave switches open or wire them together thanks for help Keith

I just cut the wires to the keyed switch in the fender and the alarm horn. Left the door switches alone . Its been about 10 yrs ago but if I remember right the relay for the alarm on my 76 was in the pass side rear compartment.Good luck

like i sais i removed the door switches and tried tying them together and i tried leaving them apart i can not find a relay for this circiut it said it was under driver side fender i can not find i think someone has already been in there and eliminated it thah is probally where the problem is i talked to ron francis yesterday about new complete harness i just did not want to go that route but i'm tired of the car sitting like this i just wish i could find a real good wiring schematis that i could understant but the ones i have are not real good i have the complete dast out now thanks everybody for replys if you can think of anything else please dont be shy thanks Keith

There is a guy on the other Corvette Forum that will send free wiring diagrams to anyone that needs them for any year vette. Hit the search button and put in free wiring diagrams . The name papawana will come up . He is from New Port Richey Fl. He will email a wiring diagram to you to copy free of charge. Great guy!

thanks for information onwiring diagram i sent him a message and will wait to hear form him i bypassed door switches and a couple of days ago yhe car started 7 times and alllites worked and seem to be ok the eight time it eas dead again i think it is in bulk head either a bad or loose pin in bulk head i hav;nt gave up yet thanks for all help Keith