#1 RH fan turns wrong way round - from factory? (SOLVED)
Posted: Sun Mar 07, 2021 7:49 am
Having removed the radiator of my “new” OTS to have it serviced, I was also repainting the cowling and installing new rubber flaps. Upon refitting the original fans, I tested them by applying 12V to both Brown and Green wires and then shorting out the connectors to the fan switch. Both fans ran…
But when they stopped, I noticed that the RH fan was turning the wrong direction, pushing air into the cowling instead of pulling it out!!! Thinking that perhaps the fan motor was at fault, I temporarily connected two other original fans (that came out my FHC when I fitted VW fans to that car) and both of them also turned in the wrong direction!
Suspecting that someone had fiddled with the wiring, I then checked the harness carefully but could not find any evidence that the original fan harness had been tampered with anywhere! The Black/Green wire was feeding the earth wire of the fan motor and the Black earth wire was feeding the green 12V wire of the fan motor.
My conclusion is that the harness male/female barrel connector on the RH side had been installed the wrong way round with Black/Green going to the earth wire of the motor (Black in the case of motors on my car) and the Black wire going to the Green wire of the motor.
Seeing no elegant way of correcting this, I cut both black/green and black wires of the harness, crimped connectors on all 4 ends and swopped them over so that the fan now also sucks air from the cowling. Now she runs just below the N on highway cruising, between N and O in town (74degC thermostats).
This car must have had this situation for all of its 48 years!!! Is this common??
But when they stopped, I noticed that the RH fan was turning the wrong direction, pushing air into the cowling instead of pulling it out!!! Thinking that perhaps the fan motor was at fault, I temporarily connected two other original fans (that came out my FHC when I fitted VW fans to that car) and both of them also turned in the wrong direction!
Suspecting that someone had fiddled with the wiring, I then checked the harness carefully but could not find any evidence that the original fan harness had been tampered with anywhere! The Black/Green wire was feeding the earth wire of the fan motor and the Black earth wire was feeding the green 12V wire of the fan motor.
My conclusion is that the harness male/female barrel connector on the RH side had been installed the wrong way round with Black/Green going to the earth wire of the motor (Black in the case of motors on my car) and the Black wire going to the Green wire of the motor.
Seeing no elegant way of correcting this, I cut both black/green and black wires of the harness, crimped connectors on all 4 ends and swopped them over so that the fan now also sucks air from the cowling. Now she runs just below the N on highway cruising, between N and O in town (74degC thermostats).
This car must have had this situation for all of its 48 years!!! Is this common??
