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#1 |
Senior Member
![]() Join Date: Nov 2022
Location: Kansas City
Posts: 497
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Please help identify sender connection
Hi all. My chassis is supposedly a 77 or 78. My 4x4 shifter connects to this part under the truck and ther are 2 blade connectors on it. Maybe for a display that indicates if the truck is in 4x4 low, high, or 2wd mode?
__________________
1971 C10 manual cab. 76 4x4 chassis. Cut short frame. Carbureted Blueprint 350, automatic 700r4. ~ James |
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#2 |
Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,663
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Re: Please help identify sender connection
Is there a 4WD light in your instrument cluster? If it doesn't light, the missing connector could be why.
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#3 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,721
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Re: Please help identify sender connection
That's exactly what it does ---indicates when in 4wd
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#4 |
Senior Member
![]() Join Date: Nov 2022
Location: Kansas City
Posts: 497
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Re: Please help identify sender connection
Ok thanks. My cab is a 71. The wiring was half torn apart with lots of missing parts when I bought the truck. I took out 100% of the wiring and am almost done installing the new wiring harness. I don't yet have a dash gauge cluster put in. Where would this light have been in a stock setup? I haven't seen a wire in the new harness for it.
__________________
1971 C10 manual cab. 76 4x4 chassis. Cut short frame. Carbureted Blueprint 350, automatic 700r4. ~ James |
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#5 |
Registered User
Join Date: Oct 2015
Location: Ottawa, Ontario, Canada
Posts: 780
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Re: Please help identify sender connection
Are you using the cluster out of a77- up truck? Because 72-67 do not have that option as far as I know.
__________________
![]() Was a 77 454 w/308 gear. Taken out 550 lbs. up front with motor clip change. |
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#6 |
Registered User
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 2,663
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Re: Please help identify sender connection
The location varies. I have an 84 CUCV (K30) that has the idiot light cluster. The 4WD light is one of the locations were gauges would go for a gauge setup. I have a cluster out of a square suburban that had gauges and the 4WD light was one of the smaller lights at the bottom of the cluster.
If you wind up with a non-4WD cluster, you could just add a light somewhere fed off that sender. IIRC - both of my 4WD lights were a variation on yellow. |
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#7 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,721
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Re: Please help identify sender connection
I think you would need the cluster that came with the truck that originally came with the 203 transfer case. Never seen a switch on a 205 shifter. That is unless there is a knock out in all the printed circuits for this option
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#8 | |
Registered User
![]() Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 3,095
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Re: Please help identify sender connection
Quote:
__________________
'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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#9 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,721
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Re: Please help identify sender connection
The 203 transfer case made its debut IN 1973 and was in GM 1/2 and 3/4 tons trucks until 1979. Mostly behind automatics. The majority of the manual transmissions got the 205. But as always there were lots of variations
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#10 |
Registered User
![]() Join Date: Feb 2000
Location: Maquoketa, Ia/ Orr, Mn
Posts: 3,095
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Re: Please help identify sender connection
According to the GM vehicle info kits only the NP205 was available in 1973 making 1974 the first year for the NP203.
__________________
'51 South Bend Model "9A" '56 Chevy 3600 NAPCO '74 Chevy Cheyenne Super K20-restored on 37's '72 GMC Sierra Custom K2500- in progress '08 GMC Envoy Denali '12 GMC Sierra 2500HD Denali '17 GMC Yukon XL VCCA member #58596 http://www.nohrco.com |
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#11 | |
Registered User
Join Date: May 2015
Location: Montana
Posts: 3,696
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Re: Please help identify sender connection
Quote:
Neither my 73 nor my 80 (350/465/205) had a 4wd indicator light that I remember. Back then people could figure out whether they were in 4wd or not, I guess ![]() I bought both of those pickups brand new, which were the only brand new vehicles I have ever owned.
__________________
Current/past Chevy/GMC trucks: 1958 Chevy C-60; 1965 GMC C-50; 1965 Chevy C-10; 1971 Chevy K-10; 1973 Chevy K-20; 1976 GMC C-20; 1977 Chevy C-10 Suburban; 1980 Chevy K-10; 1989 Chevy K1500; 1991 GMC V1500 Suburban; 2016 Chevy K2500 HD Other vehicles: 1988 Jeep XJ; 2011 Toyota 4Runner |
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