temp wire location help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

75chev4x4 · 01-13-2013, 10:14 PM

Hey guys trying to find the wire that goes to the temp sender on the block on my 75 k20. I had put an aftermarket gauge on my truck but would now like to hook up the original gauge in the dash. I grabbed a wire with connetor from the junk yard but I cant locate my wire on my truck. I have traced them all from the fuse block and cant seem to find it. Everything I read says green wire but my dark green wire goes to my starter. Can anyone help or tell me where to look for this wire?

bigd65 · 01-13-2013, 10:19 PM

Wow the green wire is all I know, if its not spliced and goes to the bulk head on the firewall, I don't know. If its spliced, look for the green wire at the bulk head, might be cut inside the harness.

Another way, if you have any open wires, first make sure they are not a 12 volt positive wire. Then with the key on, touch the suspect wire to metal and see if the gauge maxes out.
Posted via Mobile Device

75chev4x4 · 01-13-2013, 10:28 PM

Yea I had the wire orginally and I dont see it cut anywhere. I have been looking all over for an open wire on the druvers side I have a green one coming from the pass side but I know its from the driver side. Does anyone have a oic of where it comes from on the bulk head?

**hatzie** · 01-14-2013, 02:10 AM

Quote:

Originally Posted by 75chev4x4

Yea I had the wire orginally and I dont see it cut anywhere. I have been looking all over for an open wire on the druvers side I have a green one coming from the pass side but I know its from the driver side. Does anyone have a oic of where it comes from on the bulk head?

The 1975 GM truck wiring diagrams have all the bulkhead plug wire locations. Look in the 73-91 manual link in my sig.

75chev4x4 · 01-14-2013, 09:35 PM

I have no idea where this wire is, I have traced evry wire down and I cant find an open one at all. I guess I will just have to tap into it in the cab. I cant get the wiring diagrams to load correctly so is the temp wire green in the cab also? Thanks

**hatzie** · 01-16-2013, 04:26 PM

You'll need to download the PDF to a local directory on your PC then open it in the Acrobat Reader. The PDF files will not reliably open directly from the web in Acrobat Reader (this is on purpose). The files open when downloaded to a local virtual drive on my Windows 2000 VM-Ware image using the very outdated Acrobat Reader 6 ( I just tried it ) so they should work with any later Acrobat versions.

I attached a JPG crop of just the bulkhead plugs.

TEMP is CIRCUIT#35.
TEMP wire on the engine compartment side is DARK GREEN.
Cab side is DARK GREEN as well. NOTE: There are two TEMP wires in the cab. 35A goes to the Ignition Switch and 35B goes to the Instrument Cluster.

01-13-2013, 10:14 PM	#1
75chev4x4 Registered User Join Date: May 2012 Location: Estacada, Oregon Posts: 254	temp wire location help Hey guys trying to find the wire that goes to the temp sender on the block on my 75 k20. I had put an aftermarket gauge on my truck but would now like to hook up the original gauge in the dash. I grabbed a wire with connetor from the junk yard but I cant locate my wire on my truck. I have traced them all from the fuse block and cant seem to find it. Everything I read says green wire but my dark green wire goes to my starter. Can anyone help or tell me where to look for this wire?

01-13-2013, 10:19 PM	#2
bigd65 Registered User Join Date: Mar 2000 Location: Lake Jackson, TX. Posts: 1,930	Re: temp wire location help Wow the green wire is all I know, if its not spliced and goes to the bulk head on the firewall, I don't know. If its spliced, look for the green wire at the bulk head, might be cut inside the harness. Another way, if you have any open wires, first make sure they are not a 12 volt positive wire. Then with the key on, touch the suspect wire to metal and see if the gauge maxes out. Posted via Mobile Device __________________ 2004 Silverado Crewcab (Dark Spiral Gray)

01-14-2013, 09:35 PM	#5
75chev4x4 Registered User Join Date: May 2012 Location: Estacada, Oregon Posts: 254	Re: temp wire location help I have no idea where this wire is, I have traced evry wire down and I cant find an open one at all. I guess I will just have to tap into it in the cab. I cant get the wiring diagrams to load correctly so is the temp wire green in the cab also? Thanks

01-16-2013, 04:26 PM	#6
hatzie Moderator Join Date: Oct 2008 Location: Wentworth, NH Posts: 4,932	Re: temp wire location help You'll need to download the PDF to a local directory on your PC then open it in the Acrobat Reader. The PDF files will not reliably open directly from the web in Acrobat Reader (this is on purpose). The files open when downloaded to a local virtual drive on my Windows 2000 VM-Ware image using the very outdated Acrobat Reader 6 ( I just tried it ) so they should work with any later Acrobat versions. I attached a JPG crop of just the bulkhead plugs. TEMP is CIRCUIT#35. TEMP wire on the engine compartment side is DARK GREEN. Cab side is DARK GREEN as well. NOTE: There are two TEMP wires in the cab. 35A goes to the Ignition Switch and 35B goes to the Instrument Cluster. __________________ 1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials... 1973-1991 GM Light Truck Service, Unit/Overhaul, Wiring Manuals, Parts Books and Some 1968-1999 GM Service Training textbooks in PDF 1988-1998 GMT400 CK service manual project 1988-1993 GMT400 CK parts books. 1967-1972 GM Light, Medium, & Heavy Truck Service Manuals in PDF Please include at least the year and model in your threads. It'll be easier to answer your questions. And please let us know if and how your repairs were successful.

01-13-2013, 10:28 PM	#3
75chev4x4 Registered User Join Date: May 2012 Location: Estacada, Oregon Posts: 254	Re: temp wire location help Yea I had the wire orginally and I dont see it cut anywhere. I have been looking all over for an open wire on the druvers side I have a green one coming from the pass side but I know its from the driver side. Does anyone have a oic of where it comes from on the bulk head?



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.