Big 3 Questions on GMC Jimmy/S-10 Blazer

[GabeT 10+ year member]

I don't wanna mess this up, but I do wanna do this myself (with help from you guys of course).

First question, the power wire that comes off the alternator goes to a fuse or relay under the battery and another wire goes from there to the positive on the battery. A third wire which is black goes underneath the engine, I think this may go to the starter. I'm gonna be running stinger 0 AWG wire I just don't wanna send it to the wrong place and fry something. Should I run a wire from the alternator to the fuse or relay under the battery and then another from there to the battery or should I do something else. Also, there is a couple other wires that lead off that relay/fuse and go other places on the vehicle. Any ideas?

Now to the grounding, there are three wires connected to the negative on my stock setup. First wire that comes off the battery shoots all the way down and connects to the engine. the second one shoots down towards the frame just near the tire area and is grounded there. Then for some reason there is another smaller wire that wraps around the battery and grounds out to the front of the battery where there is a metal post. I disconnected 3rd smaller wire which connected to the front of the battery and everything on the truck still works, so I'm guessing I don't need this one. Can I just ground the battery to the chassis and then ground the engine to the frame making both wires shorter?

Hope I explained this well enough, if you need some pics I can probably take some.

Click to read more...

 

[johnecon2001 5,000+ posts]

I don't wanna mess this up, but I do wanna do this myself (with help from you guys of course).
First question, the power wire that comes off the alternator goes to a fuse or relay under the battery and another wire goes from there to the positive on the battery. A third wire which is black goes underneath the engine, I think this may go to the starter. I'm gonna be running stinger 0 AWG wire I just don't wanna send it to the wrong place and fry something. Should I run a wire from the alternator to the fuse or relay under the battery and then another from there to the battery or should I do something else. Also, there is a couple other wires that lead off that relay/fuse and go other places on the vehicle. Any ideas?

Just follow the guide. Run a new wire from the alt to the battery positive.

Now to the grounding, there are three wires connected to the negative on my stock setup. First wire that comes off the battery shoots all the way down and connects to the engine. the second one shoots down towards the frame just near the tire area and is grounded there. Then for some reason there is another smaller wire that wraps around the battery and grounds out to the front of the battery where there is a metal post. I disconnected 3rd smaller wire which connected to the front of the battery and everything on the truck still works, so I'm guessing I don't need this one. Can I just ground the battery to the chassis and then ground the engine to the frame making both wires shorter?

Reconnect whatever you just unconnected. Then keep following the guide. Don't remove any of the stock wiring. Just add to it.

 

[GabeT 10+ year member]

Just follow the guide. Run a new wire from the alt to the battery positive.

OK, so should I leave the smaller wire that goes from the alt to the fuse under my battery alone? Then add a new one from the alt to my positive battery terminal? That'll make 2 connections to the alt and battery.

 

[GabeT 10+ year member]

Reconnect whatever you just unconnected. Then keep following the guide. Don't remove any of the stock wiring. Just add to it.

It seemed strange to me that there are 2 wires being grounded to the vehicle. I thought once was enough.

 

[InhumanAcura 5,000+ posts]

this should help...step by step on a jimmy.

http://www.caraudio.com/forum/showthread.php?t=113426&highlight=big

 

[GabeT 10+ year member]

Thanks Matt, any chance on diggin up the pics for this? I can host them on my server if you want...

 

[InhumanAcura 5,000+ posts]

ah ****..forgot about how we used woofervids.com to host...and they went under.

sorry for the tease man, dont have the pics..

 

[GabeT 10+ year member]

Thats all right. You tried!

 

[GabeT 10+ year member]

After some reading up and talking to some of the members with experiance with GMC Jimmy/Chevy Blazers I'm not going to disconnect anything, I'm just gonna add on. Even tho It'll look messy as hell.

I went and picked up a Optima Yellow Top today and I plan on doing the big 3 tomorrow.