Auxiliary fan operation
In my 86 300E, the auxiliary fan does not come on when the temperature exceeds 115c. The fan works with direct power from the battery. There is power on the 30 terminal from fuse 7 and from fuse D on the K9 and K10 relay. Apparently the relay is not moving from the 87A to the 87 position because when I manually jump the 30 and the 87A the fan works. What am I missing? Are these relays prone to failure? The fan also works when I jump the high pressure switch. Any help would be appreciated.