Ground / Earth point in GU Patrol

Submitted: Wednesday, Jan 04, 2006 at 15:00
ThreadID: 29327 Views:2997 Replies:3 FollowUps:5
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Can anyone help with a convenient earthing point to the chassis around the drivers seat area. I have run 50 amp +ve and -ve wires direct from battery for a 300W pure sine wave inverter I want to have under the drivers seat and need to ground it to somewhere. Has anyone found a convenient bolt somewhere that I could use? The only one I have found to date (and used before) is on the passenger firewall near the grommit allowing wires etc through the firewall. I was hoping for something a bit closer.

Thanks in advance
Trevor
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Reply By: 4145derek - Wednesday, Jan 04, 2006 at 15:12

Wednesday, Jan 04, 2006 at 15:12
Derek here,

Best to just use one of the 4 seat mounting bolts. They are always a good earth. The other earth I use on customers 4wd's is in the cetre console at the base of the hand brake lever.

Enjoy regards

Derek. me
AnswerID: 146391

Follow Up By: Member - Trevor M (SA) - Wednesday, Jan 04, 2006 at 22:07

Wednesday, Jan 04, 2006 at 22:07
Thanks Derek,

The seat mounting bolt is just what I need.

Cheers
Trevor
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FollowupID: 399968

Reply By: revhead307 - Wednesday, Jan 04, 2006 at 16:16

Wednesday, Jan 04, 2006 at 16:16
Agree, either of the two above sound good.

If you have run a negative from the battery as well...its already earthed and not required to do again...

normally you would just run a + power cable..and then form a solid earth under the seat etc to complete the circuit.

so two earths is redundant...

however...a little built in redundancy never hurts

Rev
AnswerID: 146397

Follow Up By: Member - Trevor M (SA) - Wednesday, Jan 04, 2006 at 19:08

Wednesday, Jan 04, 2006 at 19:08
Hi Rev,

The instruction / installation booklet plus previous threads on this forum disagree with you. There are the 2 power terminals (both direct from battery as recommended) plus a separate lug for grounding the unit itself. I assume this is a safety issue in case there is a short?

From memory a previous thread said that this was necessary for pure sine wave inverters but not modified sine wave ones.

I'll do a search and see if I can find the thread again.

Thanks

Trev
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FollowupID: 399938

Follow Up By: revhead307 - Wednesday, Jan 04, 2006 at 19:25

Wednesday, Jan 04, 2006 at 19:25
Gday Trev,

Ok, must be specific to type of device etc as its not a normal 12V accessory wiring issue.

Always happy to learn something.

Cheers
Rev
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FollowupID: 399940

Follow Up By: Member - Trevor M (SA) - Wednesday, Jan 04, 2006 at 19:35

Wednesday, Jan 04, 2006 at 19:35
Thread # 29122 looked at this issue. Not 100% conclusive but I decided to follow the manufacturers recommendation.

Cheers
Trev
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FollowupID: 399941

Reply By: Member - Roachie (SA) - Wednesday, Jan 04, 2006 at 16:53

Wednesday, Jan 04, 2006 at 16:53
Agree with above, but would also add that I would be more inclined to earth back to either the aux battery or at least a solid part of the motor.
There have been numerous reports of blokes having trouble with sub-tank light coming on and then not being able to pump sub-tank across due to shoddy earthing of accessories on GUs.
I have one quite large earth wire coming back into the cabin and try to use that to earth other accessories onto.
AnswerID: 146407

Follow Up By: Member - Trevor M (SA) - Wednesday, Jan 04, 2006 at 19:17

Wednesday, Jan 04, 2006 at 19:17
Thanks Roachie,

I won't have an issue with the sub-tank pumping because mine is on dual fuel (great around the city but a pain range wise when you get out in the sticks and can't replenish the gas).

I look forward to seeing your truck sometime. From what I have read about the accessories you have it probably NEEDS to be a MONSTER earth wire in yours!

Cheers
Trev
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FollowupID: 399939

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