help
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Joined: Sep 2015
Posts: 82
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From: yreka ca.
help
2014 c7 stingray z51 package. got into car tried to start it everything dark,no noise,must be the batt. as its going on 5yrs.bought new batt. and junction fuse box that sets on top of batt. stil no start,no lights. new batt.in key fob. I am at a complete lost live in small town no help here. Chev dealer 50 miles away one way. will have to have it towed which I really do not want to do. Any help will be appreciated.
Thread Starter
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Joined: Sep 2015
Posts: 82
Likes: 11
From: yreka ca.
Thanks for your replies,I installed a new key fob battery this AM,the box is junction block which houses the 350 amp fuse and others I also purchase a new one of those stile no power, battery is putting out 13.8
Safety Car
Joined: Dec 2012
Posts: 3,851
Likes: 1,860
From: St. Louis Metro East IL
I'll assume you got into the car with the key and pulling the door release cable.
OK, so apparently no voltage anywhere. So, what is common? Connection from battery to fuses on top of battery and negative battery cable to chassis ground. The 350 amp fuse on top of the battery feeds almost everything.
As noted above, verify that clamps on the battery posts are pushed down, level/ flat, and tight.
Make sure that all of the buss bars where the fuses connect on the positive terminal are making good contact with each other and tight.
Measure voltage between negative battery post and each side of each fuse on top of the positive battery terminal. Should all be close to battery post to battery post voltage you noted as 13.8 (strange, fully charged is around 12.8 volts.). If all OK, fuses and connections at the battery are good.
Next check voltage at the stud on the under hood fuse box - stud is under a cover between the fuse box and coolant reservoir. Measure from stud to any substantial metal part such as the alternator case. Should be same as at the 350 amp fuse.
Also measure voltage at rear fuse block under the carpet.
Now you will probably have an idea where the problem is located and can proceed with troubleshooting.
GL
Ron
OK, so apparently no voltage anywhere. So, what is common? Connection from battery to fuses on top of battery and negative battery cable to chassis ground. The 350 amp fuse on top of the battery feeds almost everything.
As noted above, verify that clamps on the battery posts are pushed down, level/ flat, and tight.
Make sure that all of the buss bars where the fuses connect on the positive terminal are making good contact with each other and tight.
Measure voltage between negative battery post and each side of each fuse on top of the positive battery terminal. Should all be close to battery post to battery post voltage you noted as 13.8 (strange, fully charged is around 12.8 volts.). If all OK, fuses and connections at the battery are good.
Next check voltage at the stud on the under hood fuse box - stud is under a cover between the fuse box and coolant reservoir. Measure from stud to any substantial metal part such as the alternator case. Should be same as at the 350 amp fuse.
Also measure voltage at rear fuse block under the carpet.
Now you will probably have an idea where the problem is located and can proceed with troubleshooting.
GL
Ron
Last edited by RonC7; Sep 15, 2022 at 08:06 PM.
Instructor
Joined: Dec 2015
Posts: 210
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Is your security light flashing? Good power no start... maybe starter kill has been activated on the car alarm, the starter solenoid is bad. Also new battery yes, but where is the ground wire going when it leaves the battery? did it corroded and come disconnected from where it is grounded at, quick way to check this is to get a piece of 10ga wire wire or so and touch one part to the negative terminal and the other to a clean metal spot on the car and just see if u get a door open chime or mirror lights anything.
Thread Starter
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Joined: Sep 2015
Posts: 82
Likes: 11
From: yreka ca.
thanks to every one who replied. all is fixed running as it should. a buddy came over and said have you tighten all the nuts of course I said sure, he said I bet. He is much bigger and younger, He took the wrench and started in I thought he would break the post. Lights came on and it started. I am HAPPY,HAPPY. thanks again to all who helped. The forum is GREAT<GREAT.
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Great that you got the car up and running again. The C7 is very touchy when it comes to electrical connections.