96 Interior Lights

[ydeny]

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.

[Mechanical Sympathy]

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, 2014 by Mechanical Sympathy

[B.L.Z.BUB]

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

[ydeny]

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?

[Mechanical Sympathy]

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, 2014 by Mechanical Sympathy

[ydeny]

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

[Mechanical Sympathy]

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!