NEED HELP on 88 civic heater motor relay


I have an 88 civic 1.5 hatchback and the blower motor is not working. I think its a relay problem. I have checked the switch and it is functional. I am not getting any current to the fuse for the heater blower motor from the fuse box so i think its a relay. Where would it be and what else should I be checking?


Thanks
Scott

 

The relay is going to be after the fuse. Can you explain what method you used to check for current to teh fuse? Exactly what did you do?

 

Foot thanks for the reply.

I used a hot light tester to check for current at the fuse. I checked with the ignition switch in the on position and with the fan switch on and off and the light did not go on, so I figured no current since all the other fuses caused the light to come on the tester when I touched them. The AC button works when I push it in and the switch I checked for continuity with an ohm meter so I dont think any problems there. It is getting hot and I need my AC but I dont want to spend any money on something I can fix if i can find the problem. Any help is greatly appreciated.

Thanks again Foot
Scott

 

I don't have access to any shematics. If there is no power at the fuse, start tracing that wire back to its source which ends up eventually being the battery. I realize the battery is most definately fine but the problem obviously exists between the fuse box and the battery. To confirm this, try jumping around from the battery to the ground side of the fuse ( make sure you use the fuse inline with that wire ). If the blower motor works, you have just confirmed that the problem is with the power source to the fuse.

It is not ideal, but if you CANT figure out the problem and nothing else seems to be affected it can be a solution to jump a fused power wire to the fuse terminal. Sometimes it can be alot easier than finding the broken wire. Make sure you fuse the jumper wire to prevent fires.

 

Foot,

Thanks for the idea I will try that tomorrow and let you know what happend.

Scott

 

Foot,

I took the fuse box out and there is no way to trace anything. so much spaghetti. there is some kind of module that turns into a wire loom with all the wires that go to the fuse box so i was not able to trace anything back. I will just have to take it somewhere

Thanks for the help but its beyond me.

Scott

 

I would try running a power wire from the positive terminal on the battery to one pin of the fuse, another wire from the other pin on the fuse and put power to the blower motor fuse terminal in the fuse box. This will provide a fused power supply to the blower motor circuit. This is how you can prove that there is an open in the power supply to the blower motor fuse. Sometimes it is easier to make your own power wire to the circuit at the fuse box than trying to find the broken wire.