fatherdoug
Tonto Papadapolous
Yes, the cluster bulbs are 194's.
One more note on the gauges, my fuel, temp and oil gauges never seemed to be very accurate even after replacing the instrument voltage regulator, fuel sending unit, temp sending unit and oil sending unit. It was driving me nuts. I kept thinking about grounding and realized I had used thread tape on the oil and temp sending units. I pulled them out cleaned up the threads, added some thread tape to seal but left enough threading exposed to ground to the engine when they were screwed in and since then, all of the gauges have worked great!
I thought I saw online that there is a ICVR - Instrument Cluster Voltage Regulator for them but I cannot seem to locate it (10804 in pic).
D1AZ-10804-A .. ICVR - Instrument Cluster Voltage Regulator (Motorcraft GR-513) / Obsolete - Available NOS & from auto parts stores.
1971/86 F100/350 // 1971/91 Econoline // 1978/86 Bronco // 1983/85 Ranger // 1984/85 Bronco II // Misc 1971/79 FoMoCo Passenger Cars.