70' Blazer 4WD (Wire ID) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

oeespo · 10-27-2022, 08:05 AM

I have this wire lead that i don't know where it goes. i don't see it on the wiring diagram. It looks pink to me. Maybe for an accessory?

It may not be from this truck. Any help appreciated. thanks.

**VetteVet** · 10-27-2022, 10:49 AM

Hello and welcome to the board.
That wire could be for an accessory, I don't recognize the connector as anything stock.

oeespo · 10-27-2022, 11:46 AM

I just found this. it certainly coud be this wire.

Quote:

Originally Posted by GMCPaul

Heres a scan of the 1970 V8 TCS RPO-Option wiring, the 71 & 72 wiring diagrams are identical to the 1970 shown below

GMCPaul

**VetteVet** · 10-27-2022, 07:56 PM

Yes the transmission controlled spark wiring harness, I forgot about the 70 and 71s. Also the carb idle solenoid has a red wire going to it to hold the idle up if the AC is on.

oeespo · 10-31-2022, 06:20 PM

Wondering if that wire number 141 in the diagram is the brown wire in my harness? otherwise, not sure what it is.

**pjmoreland** · 11-01-2022, 11:54 AM

It might be a TH400 transmission kickdown wire. That grommet on the wire would pop into a hole in the firewall.

https://67-72chevytrucks.com/vboard/...d.php?t=811030

10-27-2022, 08:05 AM	#1
oeespo Registered User Join Date: Oct 2022 Location: New Castle Posts: 4	70' Blazer 4WD (Wire ID) I have this wire lead that i don't know where it goes. i don't see it on the wiring diagram. It looks pink to me. Maybe for an accessory? It may not be from this truck. Any help appreciated. thanks. Attached Images Last edited by oeespo; 10-27-2022 at 08:15 AM. Reason: Adding more info to subject

10-27-2022, 10:49 AM	#2
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,705	Re: 70' Blazer 4WD (Wire ID) Hello and welcome to the board. That wire could be for an accessory, I don't recognize the connector as anything stock. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

10-27-2022, 07:56 PM	#4
VetteVet Msgt USAF Ret Join Date: Jan 2005 Location: Kalamazoo, Michigan Posts: 8,705	Re: 70' Blazer 4WD (Wire ID) Yes the transmission controlled spark wiring harness, I forgot about the 70 and 71s. Also the carb idle solenoid has a red wire going to it to hold the idle up if the AC is on. __________________ VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative.

10-31-2022, 06:20 PM	#5
oeespo Registered User Join Date: Oct 2022 Location: New Castle Posts: 4	Re: 70' Blazer 4WD (Wire ID) Wondering if that wire number 141 in the diagram is the brown wire in my harness? otherwise, not sure what it is. Attached Images

11-01-2022, 11:54 AM	#6
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,316	Re: 70' Blazer 4WD (Wire ID) It might be a TH400 transmission kickdown wire. That grommet on the wire would pop into a hole in the firewall. https://67-72chevytrucks.com/vboard/...d.php?t=811030



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