Grounds & Electrical

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dtrain

dtrain

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Joined
Feb 27, 2005
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Santa Cruz Mtns
Need to get a manual but, saving for xmas so it will have to wait for now. Hope you guys will still help me  Good threads on troubleshooting but didn’t come across the answers I was after. Could use some mud brain power.

4 questions -
(1) How many and where are all the factory grounds? I want to start by Re-grounding/checking these and do the same to my “other” accessories (I am centralizing these grounds)
(2) Ref question 1: I am centralizing grounds to my “other” accessories (include: “hot” fuse panel that powers 3 sets rock lights & stereo) and things connected directly to the battery (include: second elec. fan for cooling, “hot” fuse panel (non-issue), 1 other thing. Q: My central ground is currently going to a bolt on the inner fender well (removed paint). Do I need to go from that bolt to the frame? (FYI -Battery + goes to starter and neg. from block to neg. on battery)
(3) Are "power-on" accessories able to have a parasitic draw when the ignition is in the off position?
(4) (less of a cruiser question) What gauge wire should I have running from the alt to the battery for charging when running SBC350 Chevy + dizzy.

---background---
I have a '69 55. Have a SBC350 conversion done by a PO.

Have had a hell of time with the electrical and will spare the stories. Got the alt tested – it was good, got a brand new battery - yellow top optima, drove it, worked well, let it sit for 2 weeks with battery ground disconnected.

Pulled out truck to go for spin on Saturday last week, drove for a bit (less then 15mins), parked it with battery connected and smile on my face :) Problems solved - thought the issue was a bad red-top.

Got in the truck toward the end of the day Sunday to move it - flat dead battery. Wouldn't even power a light. This whole issue started after a trip on the Rubicon exiting out the Tahoe side through the washboards so, I am starting with my grounds first. Centralize grounds for anything “hot” and check factory grounds.
 
Come on... dont be shy. I know someone has something they want to share. I will add pics if it will encourage replies :)
 
As I recall (the Pig is not in front of me right now) The ground from the battery goes first to the bolt in the fenderwell by the batterytray, then continues down to the motor mount area and bolts to the engine block...
 
Thanks pighead. Due-ly noted. I will update the setup.

Any thoughts on the other quesitons? Not sure if they are crazy or people just think Im crazy :)
 
Last edited:
Pighead said:
As I recall (the Pig is not in front of me right now) The ground from the battery goes first to the bolt in the fenderwell by the batterytray, then continues down to the motor mount area and bolts to the engine block...
Click to expand...

Correct as usual.
 
Pighead - do you know how many factory grounds there are? Its my understanding that (if its like the FJ60) there are 3 or 4 central locations that are used for grounds.
 
The stock ground wire has the tab that bolts the fenderwell, then goes down to the motor mount bolt that goes thru the motor mount...these are the only two places I can see as the factory grounds.



dtrain said:
Pighead - do you know how many factory grounds there are? Its my understanding that (if its like the FJ60) there are 3 or 4 central locations that are used for grounds.
Click to expand...
 
PH - I think the question is how many points are there where the wiring harness lands on the frame? I'd have to check a schematic for that.
 
Well, I was looking at the big wire coming off the negative terminal, and it goes to two places. That's all I know. If you wanna know how many places the harness touches the frame, and/or engine to get the ground, you're gonna need a book.


Ming89FJ62 said:
PH - I think the question is how many points are there where the wiring harness lands on the frame? I'd have to check a schematic for that.
Click to expand...
 
Ming89FJ62 said:
PH - I think the question is how many points are there where the wiring harness lands on the frame? I'd have to check a schematic for that.
Click to expand...

Exactly. Any help would be great.

Pighead said:
Well, I was looking at the big wire coming off the negative terminal, and it goes to two places. That's all I know. If you wanna know how many places the harness touches the frame, and/or engine to get the ground, you're gonna need a book.
Click to expand...

Appreciate the help. Im hoping its only a handful.
 
Howdy! I found one today while pulling off the front clip. The main wiring loop on the PS has a white wire that grounds to the fenderwell. It is in the section of harness with the fusable link, alternator wires, and headlights. John
 
White with black stripe is generally ground on the LandCruiser, at least that's been my experience. You need to electrically connect engine, chassis and body with a BIG wire or strap.
 
cruiser_guy said:
White with black stripe is generally ground on the LandCruiser, at least that's been my experience. You need to electrically connect engine, chassis and body with a BIG wire or strap.
Click to expand...

Exactly the type of info I was looking for. I will make sure to connect all the the 3. :beer:
 
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