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Old 07-08-2012, 06:39 PM
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If you wire the derale ground circuit to the OE relay coil ground as I described, it will prolong the life of the controller.
If you dont have the same setup as the OP just add a relay for the fan circuit, prefferably a 40 amp bosch, and use the derale controller relay to activate the bosch relay COIL, that way the derale control will last as it is only handling a small amount of current to run the Bosch relay which is handling the Load. And the bosch job is dispensable, or at least more so as it is quite a bit cheaper than the derale unit.
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