Problems, Are You guys using a different batt. for rear relocation UPDATE!!
I've posted all that tried to get the **** to work with the battery in the back. I had several other people check it and posted here several times with no luck.
Good luck OP hopefully you will find an answer.
I've posted all that tried to get the **** to work with the battery in the back. I had several other people check it and posted here several times with no luck.
Good luck OP hopefully you will find an answer.
Less weight is better.
Last edited by 5w20; Apr 16, 2011 at 02:07 AM.
The Best V8 Stories One Small Block at Time
If the bulk heads are fed from the same wire as trying to start the car it will not work.
The 4 is too small even if parelled. Min. size in MOP is 2 or bigger.
So it is bigger then #2, and i have high quality stinger really fine strand stuff that is very low resistance.
i always knew my power and ground was good just never had a night to devote to figuring this out, until last night.We had a couple different ideas to try going into this. So the problem here actually lies in the small factory wire that comes from the relay on the drivers side of the car.
IF you jump out the starter from the big wire, to the small post, i bet it will turn over perfect everytime. So then we thought maybe we didn't have enough feed coming from over there.(my 2 walbro fuel pumps get there power from that factory stud) But that was definatly not the case. I de pined the purple wire going into the bottom of the starter wire. The green wire is the signal from the key. The bigger red wire is the constant power.
After de pinning the purple i just touched it to the post. that is right there where it gets its power from. This is bypassing the relay. And it turned over every time perfect.
An easier way to test this would be to jump from the heavy red wire to the purple wire with good 12v's.
For what ever reason the relay cannot hold the load of the solenoid engaging on the starter. So i used the factory wiring, and wired in a 30a automotive relay, and the car turns over better then it ever has. Even better then when the battery was upfront. I am guessing the relay was on the border line from the factory, and with age, and the added distance it just isn't good enough...
I really hope this helps you guys out, this is a very simple fix, easy to test, and should cost you 3-4 bucks for a automotive relay.
Thanks, Chris
Id also like to add, there is no voltage drop anywhere in my car. less then .01 volts. Even on the small wire down at the starter, so it is not a problem of this wire being to far, or not being able to handle the load, the problem here lies in the relay. I even tried another factory relay in there, and it did the same thing. I dont know if the pins on the relay are to small, or if the relay just cannot handle the load. There isn't really any information.
Last edited by Sideways240sx; Apr 16, 2011 at 09:30 AM.
i always knew my power and ground was good just never had a night to devote to figuring this out, until last night.We had a couple different ideas to try going into this. So the problem here actually lies in the small factory wire that comes from the relay on the drivers side of the car.
IF you jump out the starter from the big wire, to the small post, i bet it will turn over perfect everytime. So then we thought maybe we didn't have enough feed coming from over there.(my 2 walbro fuel pumps get there power from that factory stud) But that was definatly not the case. I de pined the purple wire going into the bottom of the starter wire. The green wire is the signal from the key. The bigger red wire is the constant power.
After de pinning the purple i just touched it to the post. that is right there where it gets its power from. This is bypassing the relay. And it turned over every time perfect.
An easier way to test this would be to jump from the heavy red wire to the purple wire with good 12v's.
For what ever reason the relay cannot hold the load of the solenoid engaging on the starter. So i used the factory wiring, and wired in a 30a automotive relay, and the car turns over better then it ever has. Even better then when the battery was upfront. I am guessing the relay was on the border line from the factory, and with age, and the added distance it just isn't good enough...
I really hope this helps you guys out, this is a very simple fix, easy to test, and should cost you 3-4 bucks for a automotive relay.
Thanks, Chris
Id also like to add, there is no voltage drop anywhere in my car. less then .01 volts. Even on the small wire down at the starter, so it is not a problem of this wire being to far, or not being able to handle the load, the problem here lies in the relay. I even tried another factory relay in there, and it did the same thing. I dont know if the pins on the relay are to small, or if the relay just cannot handle the load. There isn't really any information.
Last edited by RARON455; Apr 16, 2011 at 07:36 PM.

Thanks, Chris
Could anyone explain or post a picture? Would be great additional info I am sure.
After months of this swap,,, I have had ZERO problems and my car will start every time,, even with the low battery no clickity click
I have had this setup for months, and it has completely fixed my problem, My problem was when I put the battery in the trunk, I Ran 1/0 welding cable to the front, and two (1/0) grounds, one to the frame, and one to the body, when I hit the start switch, clickity click for a bit and then start, sometimes, every once in a great while it would start right up, maybe 1 outta 100. rest of the time click click click then start. EVEN on a brand new battery. THIS ABSOLUTELY FIXED THE PROBLEM, it is the only thing I did and it worked perfect. Thank you again Sideways240sx for solving this problem some of us had and others didnt.
HERE IS WHERE THE STARTER RELAY IS

HERE IS THE GM SCHEMATIC YOU ARE LOOKING FOR THE RED/PURPLE/YELLOW-BLACK/DARK GREEN WIRES THEY ARE THE ONES GOING TO THE STARTER RELAY

AND HERE IS EXACTLY HOW TO WIRE THE RELAY UP
DONT LAUGH AT MY PAINT DIAGRAM I AM NOT A COMPUTER WIZ!!!

I hope this helps
Last edited by RARON455; Aug 13, 2011 at 09:07 PM.
I had the same probs you are describing trying to put the battery in the back. I had the batter grounded in the back, the motor grounded up front and I even ran a 2/0 ground cable from the battery to the block and it still would click it's *** off. I went to bigger gauge cable for the starter, alternator and fuse with the same issue. I bought a huge *** battery from sears still the same click. I went to an 11lb battery up front and went back to the stock battery cables problem solved.
What really pissed me off is a buddy came over that had his battery relocated to the back all half assed with the battery end of his + cable missing the eyelet and he just had like 5 strands of cable wrapped around the battery screw and his **** turned on










