I pulled the lock rocker & clock assembly (1999 Disco) and there are 4 wires in the back. My key lock stopped turning, so I figured I would install an external switch in the grill. Does anyone know what the 4 wires function? I bought a momentary contact on/neutral/off, but there are only 3 contacts.
I thought the dash switch would have had 3 wires, but NO, it has 4.

My thoughts were that the 2 in the center might be common, but I'll see if anyone has thoughts on this.

TIA

 

My suggestion would be to replace or repair the key lock. What if your battery goes flat or the CDL quits working?