The relay is behind the intake manifold near the firewall.
On top of the engine
1990 f350 did not have a turbo, unless it was fitted after market, so check what engine you have such as year and size and then maybe we can answer your question
GAS OR DIESEL?
how do i down load a wiring diagram for a f350 6.0 diesel engine compartment
International. Always have, and always will.
under conductor seat on the frame
14 quarts
14 quarts
top of the engine next to the fuel filter housing,it looks like a startes solinoid
15-40
94 to 03
The 2003 Ford F3 50 air conditioning clutch relay switch can be found on the firewall in the engine compartment. The air conditioning clutch relay switch will be on the passenger side of the firewall.