Help me with my fried resistor

September 1, 2018 | By Staff


I am in the process of restoring a 1950 Oldsmobile 88 tin woody wagon. My question is about the wiring; in particular the heater blower motor resistor. This unit is housed in the heater core cover under the dash, and is accessible through the heater core vent door. I am planning on wiring this vehicle for 12 volts for a number of reasons.

The previous owner had apparently wired the wagon to run 12-volts but not very professionally. My problem lies in a replacement for the resistor. The existing resistor was fried, I would assume due to being shorted out or it being unable to hold up under the 12-volt system. I have asked several local shops about this but so far only get the deer in the headlights stare. I would think a trifive GM resistor would work for this application but want to be absolutely sure. Luv the magazine and all the information you share.


There is an easy solution for your problem and that is to contact Randy Rundle’s Fifth Avenue Garage and order his blower motor voltage reducer, part #02415HR, for $18 which will do the job for sure, rather than trying to make do with ballast resistors designed for other applications.

Rundle has been producing sixto 12-volt conversion components for many years. I would also order Randy’s book on rewiring and I would request a catalog from him because you may need other items as well, and Rundle’s components are excellent and priced reasonably.

Fifth Avenue Antique Auto Parts

415 Court St., Clay Center, KS 67432