Ground strap

[dadep76]

Hi. My 1978 lemans has a ground from battery neg to block. When i turn lights on..the pass side front marker lights go out and right turn signal light on dash goes on. Sometimes pass headlight flickers. It is grounded from the firewall to block but wondering if i need the thicker ground band.

 

[pagrunt]

Check the grounds on the rad support & the negative cable to fender ground. Can never hurt to add extra ground points.

 

[dadep76]

Check the grounds on the rad support & the negative cable to fender ground. Can never hurt to add extra ground points.

Ok cool..i know theres no ground on rad support. I do have 2 little bolts under the cylinder head but affraid to take out and use strap to frame. Lol. Dont kniw if those bolts are for an add accessories or what.

 

[dadep76]

Heres what i got.

 

[g0thiac]

Hi. My 1978 lemans has a ground from battery neg to block. When i turn lights on..the pass side front marker lights go out and right turn signal light on dash goes on. Sometimes pass headlight flickers. It is grounded from the firewall to block but wondering if i need the thicker ground band.

You should have 3 grounds, not including the straps to the firewall.

1. One from battery to alternator mounts.
2. One from the body to the battery.
3. One to from the engine block to frame.

That should be all you need. Any more issues, would be grounds coming from the lights themselves. Your main ones, should be like the 3 above.

My Caprice I didn’t ground directly to the frame yet, but it seems to be fine otherwise.

 

[dadep76]

You should have 3 grounds, not including the straps to the firewall.

1. One from battery to alternator mounts.
2. One from the body to the battery.
3. One to from the engine block to frame.

That should be all you need. Any more issues, would be grounds coming from the lights themselves. Your main ones, should be like the 3 above.

My Caprice I didn’t ground directly to the frame yet, but it seems to be fine otherwise.

Ok im gonna scope it out in morn. Thanks i appreciate it. Wish me luck. Lol

 

[g0thiac]

Ok im gonna scope it out in morn. Thanks i appreciate it. Wish me luck. Lol

No worries, let me know how it all turned out.

 

[oldsmobile joe]

Hi. My 1978 lemans has a ground from battery neg to block. When i turn lights on..the pass side front marker lights go out and right turn signal light on dash goes on. Sometimes pass headlight flickers. It is grounded from the firewall to block but wondering if i need the thicker ground band.

start here.
your side marker light is back feeding and grounding out through the turn signal circuit because of a poor or missing ground.
THIS IS NOT A BATTERY GROUND ISSUE.
you should have ground wires coming out of the head light harness and bolted to the radiator support. left side and right side. 10mm bolts. check around, may be on front side or top under side of the support. start at the headlights and follow the black wires coming from the headlights. you should also have a smaller ground wire from the neg battery post to the inner fender area.

i can take pics of my 79 elco tomorrow if needed.

You should have 3 grounds, not including the straps to the firewall.

1. One from battery to alternator mounts.
2. One from the body to the battery.
3. One to from the engine block to frame.

neg battery cables were mounted in different places depending on the engine. chevys are at the alternator top mount bracket. olds are to a studded head bolt behind the alternator. not sure on buicks or pontiacs.

inner fender to neg battery cable. if the neg cable has been replaced, it may have a smaller wire coming off of it with a butt connector on it that should go to the inner fender. if not, add one.

back of engine block or back of head to firewall. if not, add one, two if you like. you can make this or buy the fancy braided ones from the parts store.

gm didn't ground the engine block to frame on these cars. i'm not saying its a bad idea or not needed, but i don't want you looking for something that never was.

 

[g0thiac]

neg battery cables were mounted in different places depending on the engine. chevys are at the alternator top mount bracket. olds are to a studded head bolt behind the alternator. not sure on buicks or pontiacs.

inner fender to neg battery cable. if the neg cable has been replaced, it may have a smaller wire coming off of it with a butt connector on it that should go to the inner fender. if not, add one.

back of engine block or back of head to firewall. if not, add one, two if you like. you can make this or buy the fancy braided ones from the parts store.

gm didn't ground the engine block to frame on these cars. i'm not saying its a bad idea or not needed, but i don't want you looking for something that never was.

Agreed to all of that and correct they didn’t have any grounds to the frame, but it never hurts either like stated haha.

 

[bracketchev1221]

I had grounds everywhere on the race car. Battery was grounded to the frame, engine was grounded to frame, body was grounded to the engine, both heads were grounded to the block.