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Pontiac Firebird 1967-2002 Birds of a feather flock together

Fan Relay

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Old 06-10-2014, 07:16 AM
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Default Fan Relay
2001 Trans Am.

If one of my fan relays is bad - would that throw a code if I had the computer scanned?

Also, the way I understand it - the fan has two speeds - why three relays?

Thanks!
Dan
Last edited by ds2011; 06-10-2014 at 07:35 AM.
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Old 06-10-2014, 11:14 PM
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The PCM only grounds the powered coils of the relays so no, a bad relay or fan shouldn't be able to set a code.

Three relays are used because they run in low speed in series and high speed in parallel. Can't be done with two relays.
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