Gauge Cluster Swap

[1979 K10]

I’m trying to swap my idiot lights to gauges in my 86 k5 Blazer. I tried moving the pins around The big connector but I can only get the volt gauge to work. I used a pin out on another post but some of my wire colors don’t match. Fuel, temp and oil are all pegged and gauge lights won’t illuminate so I must have a few pins in the wrong spot.

I unplugged the original oil pressure sensor and realized that affects the electric choke warming up. Aka high idle when engine is warm. I either need to find a splitter so I can run two oil pressure sensors or abandoned the factory idiot light sensor and just give the choke 12V key on.

 

[1979 K10]

Here’s what my connector looks like. Pic before I moved pins around.

 

[bucket]

Besides moving pins to the correct locations, you will need a temp sender and an oil pressure sender to replace your temp switch and oil pressure switch.

 

[1979 K10]

I replaced the oil pressure switch with the big bell shaped sensor SP174 and the temp sensor with a TS76 temp sensor. I’ll have to get the voltmeter next and ring out the wires from the sensors to the cluster to see if they are in the correct spot.

I had no idea the idiot light oil pressure switch also controlled power to the choke heater on the quadrajet. I was wondering why my idle was high and choke took forever to open once I disconnected the 2 pin oil pressure idiot light switch.

 

[Turbo4whl]

The 2 pin oil pressure switch is just for the choke. The oil pressure sensor or light switch is just one pin. Usually located at the top of the engine block behind the intake manifold.