Climate control fan not working

[particlewave]

Heater fan relay # 18 is activated by power from fuse C7, which is powered through the ignition switch.

Check fuse C7.
Turn ignition on.
Check for voltage at C7.
Check for voltage at pin 86 of relay 18.

If no voltage at pin 86, replace C7.
If no voltage at C7, replace ignition switch.
If good voltage at both, replace the relay.

That's all there is between the battery and the fan switch.

[Paul]

That explains why the fan switch works when 30 and 87 are jumpered. The fan switch is between the relay and the resistors/fan, not between the ignition switch and relay.

[Skullb]

Originally Posted by particlewave

Heater fan relay # 18 is activated by power from fuse C7, which is powered through the ignition switch.

Check fuse C7.
Turn ignition on.
Check for voltage at C7.
Check for voltage at pin 86 of relay 18.

If no voltage at pin 86, replace C7.
If no voltage at C7, replace ignition switch.
If good voltage at both, replace the relay.

That's all there is between the battery and the fan switch.

Thank you .
I will let you know how I get on.

[Skullb]

SORTED !
Paul and particle wave thanks for the helpful suggestions.

Spot on . I checked fuse C7 which until it was suggested I had no idea that it might be a fuse relevant to my problem and had only checked the obvious ones.

C7 had blown and on replacement everything works fine.

A big thanks to everyone .

[Skullb]

Spot on !

Thanks . I checked C7 and it had blown.

Thanks