tpi harness issue
Thread Starter
Joined: Mar 2002
Posts: 854
Likes: 10
From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
tpi harness issue
ok techs. i have a problem. im doing a tpi conversion from a 91 tbi and have posted in the tpi section. it is a 92 speed density harness with no appearent modifications. i have no power what so ever. turn the key and nothing at all. no headlights, fuel pump, nada. with a test light im getting power to the harness. volt check shows 12 volts to the battery. fog lights run only from battery and work. so its not battery..
the connector near the battery with one orange and red wire was repaired. the orange wire was cut and repaired. after the factory connection there is power. i checked the plugs ins and dont see nothing. ground straps and connections are checked and secure.
fuse mounted near battery on the inner fender wall is good and getting power.
vats?
fusible link?
possible problem at the black plug near the master cylinder?
repin?
what am i missing?
the connector near the battery with one orange and red wire was repaired. the orange wire was cut and repaired. after the factory connection there is power. i checked the plugs ins and dont see nothing. ground straps and connections are checked and secure.
fuse mounted near battery on the inner fender wall is good and getting power.
vats?
fusible link?
possible problem at the black plug near the master cylinder?
repin?
what am i missing?
Supreme Member
iTrader: (2)
Joined: May 2009
Posts: 3,371
Likes: 2
From: Delaware
Car: 91' Firebird SOLD
Engine: 350 TPI +bolt-ons
Transmission: 700r4
Axle/Gears: 3:42
Re: tpi harness issue
So, let me get this straight. You have have already installed the 92' tpi harness in the car with the tpi 1227730 ecm and proper prom (chip)?
Re: tpi harness issue
Even with no ECM plugged in and VATS on the fritz, it should still power up atleast the lights
You dont have 12v in all the right places. Check your fusible links again and make sure the two 12v wires near the battery are connected to a 12v source. You'll have to cut off the TPI specific connector
You dont have 12v in all the right places. Check your fusible links again and make sure the two 12v wires near the battery are connected to a 12v source. You'll have to cut off the TPI specific connector
Thread Starter
Joined: Mar 2002
Posts: 854
Likes: 10
From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: tpi harness issue
it is the correct harness, ecm and chip according to the numbers. there is only one connector to the positive side cable. it has connection to the starter cable and to the alternator.
the connector to be removed is a plug in that has a red and orange wire, which i repaired the orange wire. that is to be removed?
i will double check the fusible links and grounds and post back.
the connector to be removed is a plug in that has a red and orange wire, which i repaired the orange wire. that is to be removed?
i will double check the fusible links and grounds and post back.
Thread Starter
Joined: Mar 2002
Posts: 854
Likes: 10
From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: tpi harness issue
i do appreciate the help.
both red and orange are getting power at the battery, fuse and after the black connector. the red cable to the alternator is also getting power.

i see one fuse link combining red and orange and no other. ideas?
both red and orange are getting power at the battery, fuse and after the black connector. the red cable to the alternator is also getting power.

i see one fuse link combining red and orange and no other. ideas?
Thread Starter
Joined: Mar 2002
Posts: 854
Likes: 10
From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: tpi harness issue
i rechecked the wires and get power to the relay block on the drivers side. i double checked the black connector under the relays. what am i missing?
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Thread Starter
Joined: Mar 2002
Posts: 854
Likes: 10
From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: tpi harness issue
ok i have no powerto either red wire at c100. where do i back track to?
Thread Starter
Joined: Mar 2002
Posts: 854
Likes: 10
From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: tpi harness issue
uh..no. i didnt see them tucked out of the way till i got under there. so. give me 10 minutes and ill post back the results. thanks.
Thread Starter
Joined: Mar 2002
Posts: 854
Likes: 10
From: Rincon, Ga.
Car: 91 Camaro RS
Engine: 305 TPI conversion.
Transmission: T56
Axle/Gears: 3.73 posi 4th gen rear
Re: tpi harness issue
i would like to express my appreciation to you pocket, as this resolved the problem. lesson here, check everything twice. she fired up and with a little tuning and timing shes good to go.
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