Code 33, AC Relay Circuit Open Shorted

Dodge, Caravan, 1994, 75,000, 3.3L

Engine light comes on intermittently
when A/C is on. Restarting engine clears engine light for various lengths of time.

A/C works great.

Dumped a Code 33.

Cleaned relay and fuse terminals (appear to be aluminum rather copper).

Problem persists.

Searched TSB's titles this vehicle, but no specific mention this problem in title.



Other than new relay (which I have doubts this is problem) any help appreciated.

Thanks
David

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RESOLUTION:
Pulled All relays in power center. Cleaned terminals and reinstalled. Appears to have resolved problem.