William Mosley
TYF Newbie
- Joined
- Jul 22, 2011
- Posts
- 20
- Reaction score
- 0
Ok I got my truck back from the shade tree mechanic, thought I would
Save a few bucks and do not have a lift. look at me now.
It's a 1998 gmc Yukon 4x4 5.7 liter.
Got it back from a transmission replacement. He said come and get it he was
Tired of fooling with it.
Trans. Was in but it would not start. Checked all the fuses and they were fine.
I would turn the key on and lights would come on and fuel pump primes.
Then go to start it and nothing would happen. Lights would dim a little and the shift indicator light would stay off til i would turn the key over. I would let off the key in the start position and light goes back off. Being the novice mechanic I am, I got it to start by jumping a wire from the starter relay to the big yellow ignition wire that comes out of the ignition switch harness. It starts with the key this way. I tried replacing the starter relay with the one out of my wrecked yukon thats works. No luck. Also when I did get it cranked up I shifted out of park into reverse and the # 20, (prnd21) 10 amp fuse keeps blowing which puts the trans into limp mode. ....... I purchased I wrecked 1998 Yukon when the trans. Went out. So I have alot of extra parts around. I thought it might be the ignition switch. So I took off the one from the wrecked one, which by the way I drove it home, it runs fine just has a bent frame. And i have the same results . I replaced the neutral saftey switch with no luck .
Also I thought I might have a bad wiring harness going to the trans. So I replaced it from the tailshaft all the way to the back of the motor, including the o2 sensor wires with the same results. I have no obd 2 reader so I have 2 problems here, even help with just one would be greatly appreciated. plzzzzzzzzzzzzzzz help.
This is my first post I am at my wits end with this truck.
Save a few bucks and do not have a lift. look at me now.
It's a 1998 gmc Yukon 4x4 5.7 liter.
Got it back from a transmission replacement. He said come and get it he was
Tired of fooling with it.
Trans. Was in but it would not start. Checked all the fuses and they were fine.
I would turn the key on and lights would come on and fuel pump primes.
Then go to start it and nothing would happen. Lights would dim a little and the shift indicator light would stay off til i would turn the key over. I would let off the key in the start position and light goes back off. Being the novice mechanic I am, I got it to start by jumping a wire from the starter relay to the big yellow ignition wire that comes out of the ignition switch harness. It starts with the key this way. I tried replacing the starter relay with the one out of my wrecked yukon thats works. No luck. Also when I did get it cranked up I shifted out of park into reverse and the # 20, (prnd21) 10 amp fuse keeps blowing which puts the trans into limp mode. ....... I purchased I wrecked 1998 Yukon when the trans. Went out. So I have alot of extra parts around. I thought it might be the ignition switch. So I took off the one from the wrecked one, which by the way I drove it home, it runs fine just has a bent frame. And i have the same results . I replaced the neutral saftey switch with no luck .
Also I thought I might have a bad wiring harness going to the trans. So I replaced it from the tailshaft all the way to the back of the motor, including the o2 sensor wires with the same results. I have no obd 2 reader so I have 2 problems here, even help with just one would be greatly appreciated. plzzzzzzzzzzzzzzz help.
This is my first post I am at my wits end with this truck.
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