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5.9 cummins
You should have battery voltage at the blower, with the key on, In run. It is supplied by the ignition switch. The ground is controlled by the fan switch, through the resister, and is grounded behind the center of the dash.
Are you saying this is the only area that the problem will be. I have replaced the temp control module, the resistor and the blower motor is good checked voltage with key on at back of module and had 11.5 volts
Where on the back of the module? At the fan switch, 4 prongs will probably have battery voltage from feedback at the blower motor. There should be a good ground on the blk/drk blu wire, which is the one that turns to the other ones. You need a power probe, not just a DVOM.
Checked the back of the module at the big plug with key on and that was where the 11.5Volts read. Checked with a DVOM - are you saying that voltage goes to blower motor first and module
The dark blue wire behind the module is a power wire to the module. The blower is not****not powered through the module. The ground side of the blower is controlled through the blower switch in the module. Does this help you understand. Check previous post about the ground that is used.
Thank you for your help I will try you suggestions -
I'm looking at the diagram as we're talking, so it will be right. Let me know.