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07-21-2021, 08:26 AM | #1 |
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93 C1500 Junction block question
On this 93 C1500 project I am working on the heavy black wire with the arrow pointing at it is just cut off at the other end and I am not sure where it goes.
Thanks
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1999 Chevy K2500 RCLB 350 4L80e 2004 Chevy 3500 C&C Dmax Allison |
07-21-2021, 09:07 AM | #2 |
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Re: 93 C1500 Junction block question
The schematic for the junction block in the service manual did not match the way these trucks came from the factory before anybody touched them.
That position on the block was usually used for optional equipment like an under hood light or an auxiliary cooling fan.
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07-21-2021, 09:40 AM | #3 | |
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Re: 93 C1500 Junction block question
Quote:
Only connection from the battery I know for certain that has 12v is the cable to the starter. Other than that I can't see where the rest of the truck is getting 12v to anything.
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07-21-2021, 01:20 PM | #4 |
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Re: 93 C1500 Junction block question
The schematic shows a wire running from the positive battery to the battery junction block. It also shows a wire from the alternator out put terminal going to the battery junction block.
The schematic shows all wires connected to the battery junction block have a fusible link.
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07-21-2021, 01:37 PM | #5 | |
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Re: 93 C1500 Junction block question
On my '93 that went to the starter. I moved it to the battery.
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07-21-2021, 06:31 PM | #6 | |
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Re: 93 C1500 Junction block question
Quote:
She runs again.
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07-22-2021, 10:18 AM | #7 | |
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Re: 93 C1500 Junction block question
Quote:
I am seeing references to 2, one in the left side exhaust manifold and another down under the cab. I can only find wiring for the one under the cab ( 3-wire connection)
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07-22-2021, 11:17 AM | #8 | |
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Re: 93 C1500 Junction block question
There is only one oxygen sensor and it has one wire.
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07-22-2021, 11:23 AM | #9 |
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Re: 93 C1500 Junction block question
I can't find a one wire hookup for a oxy sensor anywhere.
This truck originally had a 4.3v6 and was swapped to a 350, wonder if that has something to do with it.
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07-22-2021, 02:43 PM | #10 | |
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Re: 93 C1500 Junction block question
Quote:
The trucks with a 4.3 V6 had a three wire heated oxygen sensor. The trucks with a V8 had a one wire oxygen sensor.
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07-22-2021, 03:11 PM | #11 | |
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Re: 93 C1500 Junction block question
Quote:
If not I will see if I can hunt down a 93 V-8 engine harness.
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