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10 gauge ground wire

jhyatt7

Member
87
2
8
Location
texas
Ok, I know my starter is bad, but what would cause the 10 gauge wire that goes from the front battery negative battery cable to the body to burn up while starting the truck?:tank:
 

Warthog

Moderator
Super Moderator
Steel Soldiers Supporter
13,774
232
63
Location
OKC, OK
Your other BIG ground wires are not making good contact so all the work is put on the 10 ga wire. You also need the braided wire going from the engine to the body (passenger rear)

Grounds play a very important role in how any electrical system works.
 

markg

Member
352
1
18
Location
hutto,tx
Ok, I know my starter is bad, but what would cause the 10 gauge wire that goes from the front battery negative battery cable to the body to burn up while starting the truck?:tank:
.... and that other big wire goes from the negative bus to the back of the intake manifold. it gets loose because gm put the ground cable on top of one of the intake bolts with another nut on top. remove the top nut that holds the cable.(you may have to get a thin 14mm-9/16 to hold the bottom bolt. ) then take a deep socket and tighten the bottom bolt into the block. re install the cable. that will take care of it. after you do that you may find your starter is not bad.
 
Last edited:

K9Vic

Active member
1,261
7
38
Location
Fort Worth, TX
:ditto:

I had this problem on my M1031 where my starter was not engaging and I took it out and had it check out and was fine. My starter/alternator guy knows CUCV trucks and he told me exactly what markg said (Ricks Alternators in Hillsboro, TX). Before I took the starter out I cleaned all the grounds except the one on the engine block. well after I cleaned that my M1031 starts fine now. Like markg said you have to hold the cable so the top bolt comes off and it helps to use an impact. So that engine block ground is very important as I found out.
 

stationjj

Member
263
1
18
Location
Middle Tennessee
I second what Warthog and K9VIC said. I learned that lesson about engine Block ground the hard way. Cost me a lot of time and frustration.

I was amazed the difference an updated engine block ground made on my 1009.

stationjj
 
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