hi everyone I have a 96 corolla with a 2e engine now I have been trying to get power to the interior lights, when I checked the fuse under the hood in jb2 it was blown so it was changed, now however with that fuse in the rad fans and a/c fan run without the key in the ignition or the engine running.can anyone help? I don't have a wiring diagram for his car but I did change the fan relay at the same time.

You've wired the relay up incorrectly or the relay is faulty.

 

A multimeter and a wiring diagram will help you get to the bottom of it.

Edited February 26, 201412 yr by Mechanical Sympathy

Relay could be 'always on' instead of 'always off'.

thanks guys all I did was replace the old relay I didn't change any of the wiring though perhaps that was done before, would a faulty temperature sensor do this without the engine running?

No I don't reckon that's it.

 

As Reed suggested you may have bought the wrong kind of relay i.e. Normally Closed instead of Normally Open if you've plugged the wiring into like-for-like.

 

Or possibly - if you've run your own wiring (edit: you didn't) or you plugged them in wrong - you may have wired it straight to the battery instead of an "ignition on" circuit.

 

Edited February 26, 201412 yr by Mechanical Sympathy

thanks MS

 

I am jut puzzled a to how the fuse for the dome light has anything to do with the circuit for he rad and ac fans if I ad a wiring diagram it would help. and it is possible they sold me the wrong relay

Check the relay it will say "NC" or "NO" on it somewhere.

 

If you've got the wrong one grab yourself a Gregory's or Haynes service manual for your car when you go back to the shop. They're essential reading for the backyard mechanic!