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You can find the air conditioner fuse for your 1990 Ford in the fuse box. The fuse box is located beneath the drivers side dashboard. The fuse box will also contain an air conditioner relay switch.
the Fuel pump relay is inside the driver's front wheelwell to the right
it is located on the transmission itself
The 1990 G20 Chevrolet Van fuel relay switch is located on the front of the fuel tank. The relay switch is next to the fuel pump.
The 1990 Jeep Cherokee electric fan relay switch is located on the firewall in the engine compartment. The fan relay switch will be on the passenger side of the firewall.
There is a relay between your ignition switch and the starter though. Check in the driver's side fender well above the fender skirting. You will find an inline relay.
The 1990 Jeep Cherokee electric fan relay switch is located on the firewall in the engine compartment. The fan relay switch will be on the passenger side of the firewall.
The 1990 Mazda 323 horn relay switch can be found on the front drivers side quarter panel. The relay switch will be on the inside of the quarter panel.
MPI relay is behind the radio.
There is no fuel kill switch on the 1990 Nissan Maxima. There is a fuel pump relay switch that can cause the fuel to be suppressed.
Ign relay at main ign switch behind the steer.
It has a flasher relay for the signals only.