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?

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.

Re: Please help identify sender connection
 

That's exactly what it does ---indicates when in 4wd

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.

Re: Please help identify sender connection
 

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.

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

Re: Please help identify sender connection
 

Not a stock setup in a '72 or older and is not needed unless you need a dash indicator to show you have 4 wheel drive engaged. This is also on a NP203 transfer case which was not available on 73 or older trucks. The 4 wheel lock indicator switch showed up starting in '77.

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

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.

Re: Please help identify sender connection
 

My 73 a/t was the 205. I was told that some of the later production for 73 MY was 203. I had a heck of a time getting the correct front driveshaft for it as by that time (79?) all the parts stores said 350/auto was 203. After several tries the one that fit was supposed to be for a six cylinder manual.

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 :lol:

I bought both of those pickups brand new, which were the only brand new vehicles I have ever owned.