Where is the coolant temp switch on a 89 DX with a D15b2? I have a couple of manuals that refer to two different switches- a "Thermoswitch" and a "Coolant Temp Switch". It also shows 2 locations. One under the dist cap and the other behind the water pump. Are there 2 switches? What do they do? Are the manuals for different motors or what? I'm having some cooling fan troubles! Halp!

I know where the guage sender is and that's not the one under the dist that I'm talking about.


Modified by D50boy at 11:56 AM 8/22/2008

 

the coolant temp sensor is the single wire sensor located underneath the distributor on the cylinder head.

the thermo-fan switch is located on the back of the engine block by the oil filter with 2 wires and a rubber boot protecting it.

 

there are 3 coolant temp sensors on the engine - the sensor for the gauge is on the end of the head below the distributor and has a one-wire connector (yellow with green stripe wire) - the sensor for the ECU is also on the end of the head next to the gauge sensor and has a 2-wire connector (red with white stripe and green with white stripe wires) - the cooling fan sensor/switch is on the back of the block next to the oil filter and has a 2-wire connector (yellow with green stripe and black wires) with round rubber boot on the connector

 

Thanks!

Found the problems- one fan motor was dead and the other fan had a burnt fuse... and was wired up backwards!