1997 Pontiac Grand Prix. Replaced seized blower motor and faulty resistor.
The blower motor works only on high mode, the lower modes do not work and also its affecting the
daytime driving lights when blower speeds is used.

Could you please give me a little more info. The blower motor was seized, and the resistor was
replaced. Did either show any signs of corrosion or discoloration at the electrical connectors? Any
other odd electrical problems before the replacement of these parts? Any other info will be helpful.
Thanks and I will wait for your reply.

Visitor reply:
no corrosion at all on terminals what its doing is this problem was their before the blower and
resistor was replaced. The problem was the DRL lights go off when blower motor switch is used
and go back on when the switch is off. Also the blower motor only works in high mode after a
slight delay. What I'm hearing is the relays clicking in the day time driving light module when the
blower switch is used. Thanks any questions let me know. Thanks.

OK, i think i found something to be of help. After looking through several wiring diagrams, i have
found that the Daytime running Lights Module and a power input to the a/c control head share
the same fuse (DIC/HVAC) There is also a DRL diode in the system. The module and the diode
are on the lf. side/under the dash.

We need to find out which part is clicking erratically. Apparently there is some electrical back
feeding going on, and effecting the DRL/headlights. I wound suspect a faulty DRL module, but
the diode may be the original problem, causing the module go bad. Hope this was helpful. Let me
know what you find......

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1997 Grand Prix Headlights And Blower Speeds Problem