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Bench-testing overdrive relay 200 1984

posted by  Lord Volvo on  Sun Jan 13 13:02 CST 2013
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last visit: Sat Oct 4 15:55 CST 2014
[RELATED]

Short version - How do you bench-test an overdrive relay?

Long version - My OD for my M46 tranny stopped working. I bypassed the relay using the method described here ( http://www.brickboard.com/PRINT/?id=796055 ) and it engages just fine. I put an ohmmeter across the shift-knob switch and it works fine. I have installed several OD relays, a few of which I was told were functional, and still nothing. I've tried resoldering a few of them as well and still nothing.

I assume that either my relay karma is bad or maybe the 4th-gear switch is bad. It would be easier to confirm that a relay is good before digging for that 4th gear switch (which I don't want to do in the cold and snow), so can someone help? I do have access to a 12-volt power supply if that's needed for testing.

As long as I'm on the topic, do I have to lower the tranny to access that switch?

Thanks.
--
Mike F - 1984 244 DL - 317,000 miles
Original engine, transmission, drive train, starter
Undergoing reconstructive surgery with POR-15

1972 142 S - The Yellow Brick - 135,000 miles
All stock except for Weber Carb. B20B engine. M40






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