I have the windstar set-up on my son's 70 chevelle. We have the fans hooked to individual bosch relays and a manual switch. The manual switch is temporary until I can figure out how to wire the mechanical temp sensor switch. I have been reading the posts concerning this and I am thoroughly confused.
This car does not have A/C. I would like the fans to come on at 195 and go off at 185. I would also like to be able to manually overide this system both ways, off and on. The temp sensor is an adjustable mechanical sensor from, JC Whitney, with a probe that attaches to the back of the radiator fins.
Can the connections be explained in this forum, or is it to technical to type out?
If you are familiar with the bosch relays;
1. ground wire of both fans are connected to a ground on the radiator core support.
2. the hot on the fans is connected individually to the #87 terminal on their perspective relays.
3. the #85 terminal, relay grounds, are connected to the radiator core support ground.
4. the #30 terminal on the relays are connected to the batt pos. terminal block on the firewall.
5. the manual switch is connected to a battery hot, (terminal block on the firewall),. The other side of the switch is connected to the #86 terminal for both relays.
This set-up works well with the one manual switch. I just don't know how to add the other options into the set-up.
thanks.............bk
This car does not have A/C. I would like the fans to come on at 195 and go off at 185. I would also like to be able to manually overide this system both ways, off and on. The temp sensor is an adjustable mechanical sensor from, JC Whitney, with a probe that attaches to the back of the radiator fins.
Can the connections be explained in this forum, or is it to technical to type out?
If you are familiar with the bosch relays;
1. ground wire of both fans are connected to a ground on the radiator core support.
2. the hot on the fans is connected individually to the #87 terminal on their perspective relays.
3. the #85 terminal, relay grounds, are connected to the radiator core support ground.
4. the #30 terminal on the relays are connected to the batt pos. terminal block on the firewall.
5. the manual switch is connected to a battery hot, (terminal block on the firewall),. The other side of the switch is connected to the #86 terminal for both relays.
This set-up works well with the one manual switch. I just don't know how to add the other options into the set-up.
thanks.............bk