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[05omegav6]

Nothing

Just to add in response to Symes, compressor connection fine currently running it with 12v feed from battery direct to clutch output of the relay holder

[Kevin Wood]

Nothing

That's odd

Do you have 12V at pin 30 and 86 of the relay base with the ignition on?

Forgot to say, if you're going to manually operate the relay contacts, ignition needs to be on.

[05omegav6]

Had guessed that much

Nothing between 86 and 30, but my multimeter might be defunct doesn't register a voltage across the battery, let alone a relay

[Andy B]

..., but my multimeter might be defunct doesn't register a voltage across the battery, let alone a relay

Ooops!     

[Kevin Wood]

Had guessed that much

Nothing between 86 and 30, but my multimeter might be defunct doesn't register a voltage across the battery, let alone a relay

Have you been using the Amps range and fubared the internal fuse?

Anyway, I was talking about between 86 / 30 and ground. There'll be nothing between them but they should both get an ignition switched feed.

[05omegav6]

Can connect all four terminals together, engine running and nothing happens

[Kevin Wood]

Can connect all four terminals together, engine running and nothing happens

Ok.. But if you connect pin 86 to 12V the compressor and fans kick in?

Are you sure F29 is OK?

[05omegav6]

Yes to both

[05omegav6]

Right progress of sorts

Now if I connect sockets 30 and 87 together, with no relay, the aircon clutch engages, and the fans run when the ignition is switched on. Switch off, all goes off  which means I no longer need the direct connection to the battery

Relay in and nothing happens

Have yet to try another relay, but previously they all tested working in the horn circuit...