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C4 Cooling and Heating Systems

Manual Switch for Secondary Fan (1/1)
 4/9/19 9:58am
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Westfield, MA - USA

1988 Red Convertible just purchased on Nov 2016.

Joined: 12/3/2016
Posts: 70

I have a 1988 base convertible last year I had a temperature switch put in that was to come on at 200 deg but it came on at 170 deg.  I saw where mechanic tied in to the relay so I wired a switch to his wires and I now control primary fan manually.  I would like to do the same with secondary but I know it is controlled by ECM I do not want to screw this up. Can someone tell me how to wire a switch that would control the secondary fan and not screw up anything else?  thanks for help.

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