Suggestions for dash ground? - Team Camaro Tech
Electrical & Wiring Troubleshooting electrical.

 
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post #1 of 4 (permalink) Old Mar 7th, 05, 04:09 AM Thread Starter
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Bryan
 
Join Date: Aug 2002
Location: Albuquerque, NM
Posts: 405
Question

Does anyone have any good suggestions on where to put a main ground for all of the underdash electrical? Or is there a better way to do it? After installing an aftermarket stereo, upgraded Autometer gauges, keyless entry, power locks, etc., there sure are a lot of ground wires. Should I run one good ground wire (from where? the fuse block?) and connect it to all of the grounds with good connectors? With all of the old rusty metal underneath the dash, it sure is harder to just ground each wire individually in convenient locations. Any suggestions? Thanks.

1968 Camaro, 383 with Dart Pro 1 aluminum heads and roller cam, Holley Sniper EFI with Dual Sync distributor, Muncie M21 4-speed transmission, 3.73 12-bolt Eaton posi differential.


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post #2 of 4 (permalink) Old Mar 8th, 05, 02:16 PM
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Brandon
 
Join Date: May 2004
Location: Monroe, NC
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Each unit typically has its own ground, But if you want to run a single branching ground. Connect it to the bottom of the dash where the steering wheel mount bracket is.. Best ground you'll find

Brandon J. licence 1NASTY67

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post #3 of 4 (permalink) Old Mar 8th, 05, 02:38 PM
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Jim
 
Join Date: Dec 2002
Location: Saint Louis, Missouri
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Look to see how big the wire is from the battery negative terminal to the fender and also look for any other ground straps between the engine and the firewall. If you only have a single small 10-12 gauge wire between the battery negative terminal and the fender you may want to upgrade that to an 8 gauge.
Added accessories like door locks, security systems, radio's, and such can be grounded to the firewall or any other underdash metal that is welded together but if that area is not given an easy path back to the battery negative terminal then the electrical devices may not perform as best they should.
Any time I install anything larger than an 8 gauge power wire off of the batteries positive post for things like an amplifier I always upgrade the ground connection between the battery and the body of the car.
I had a poor connection recently on the wire between the negative post of the battery and the fender and the headlights were dimmer than usual and the fan for the heater was running slower than normal. If I was driving the car sometimes the headlights would be bright and then dim as the ground from the body was trying to make a better connection to the engine block through the shifter linkage and the emergency brake cables. Once I fixed just that one wire numerous thing started working better.
Where ever you make a connection, make it to a clean surface and try and use star washers and have the connection nut and bolted together and stay away from self tapping screws if possible.
Jim

1974 Spirit Of America Nova (being restored), 1973 Nova Custom, 1968 Chevy II (Garage Find 2012)

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post #4 of 4 (permalink) Old Mar 13th, 05, 06:19 AM Thread Starter
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Bryan
 
Join Date: Aug 2002
Location: Albuquerque, NM
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Both excellent ideas and what I was looking for. I hadn't thought of connecting near the steering column, but it makes sense since it would be a closer connection to the engine block. I'll also check my ground connections from the battery, fender, and firewall. With all of the old wire and rusty metal, no wonder things aren't grounding optimally. Thanks for the help!

1968 Camaro, 383 with Dart Pro 1 aluminum heads and roller cam, Holley Sniper EFI with Dual Sync distributor, Muncie M21 4-speed transmission, 3.73 12-bolt Eaton posi differential.


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