First off you do not have a 3.5 liter V6 engine in a 1990 Accord. The engine is a 4 cylinder 2.2 liter. The 3.5 liter did not even come on an Accord until 2008. The relay is located under the dash on the drivers side, it has seven terminals and is refered to as the main fuel injection relay. If you want to test the pump, use a paperclip to jumper the black with yellow tracer and the yellow with black tracer wires together, the pump should run. In some models of Accords they used a solid yellow wire in place of the yellow/black wire.
The 1989 Honda Accord blower motor relay switch can be found on the firewall in the engine compartment. The blower motor relay switch will be on the passenger side of the firewall.
Under the bonnet
If an automatic window will fail to lower on a 1991 Honda Accord than the power winder motor or relay can be the problem. The easiest place to check is the relay. If the relay is fine than the motor is failing.
where is the transmission relay on a 1999 Honda Accord
Check the fuse and the relay.
behind the glovebox.gm Jim
where is relay on 1994 Honda accord for sun roof
the a/c relay location in a 1996 Honda accord
where is the fuel pump relay for a 1991 Honda accord located
where is starter relay on 2006 Honda Accord
Blown fuse, defective fan motor, or defective thermal relay.
Anyopne know the cost of a lighting relay for a 1992 Honda Accord EX ?