Question about Mercury Cougar

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Blower motor runs when jumped from battery.checked fuses,switch,and resistor all are good.put test light on hot lead to blower switch and get no power with ignition switch on and or car running .thanks

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Sounds like the blower relay switch is bad. It's a small black square object, usually mounted on the firewall with two others, or in the fuse box in the engine compartment.

Posted on Oct 07, 2010

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Posted on Jan 02, 2017

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Blower motor 2009 saturn vue doesn't come on, fuse is good, what next?


DISCONNECT THE BLOWER MOTOR POWER LEAD. RUN A "FUSED" (20AMP) HOT JUMPER WIRE TO POSITIVE SIDE OF CONNECTOR,THEN TO BATTERY POSITIVE, THEN RUN A NEG. WIRE BACK TO NEG. AT BATTERY (TO INSURE A FULL CIRCUIT).
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To test the blower motor run a jumper wire from the hot side directly to the hot terminal on the battery. If the motor is in good condition it should come on. If it comes on that may indicate a bad resistor pack. Since the resistor is an electrical part which is self-contained would probably be easier to change than to test. You should do the resistor pack first (before the switch) because it is the easier of the two to change out. If replacing the resistor pack does not fix the problem then you will need to replace the switch.

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Front blower motor does not work at all with the heat or the a/c on the rear motor works fine. I have changed the relay and the fuse but it still doesnt work i wanted to know if its the blower motor or the...


There are the only three items remaining in the circuit. It could be Motor, resistors or on/off switch.
To test blower run a pair of jumper wires from battery to motor terminals and she if it runs .
Switch is easy : remove it from its connectors and jump the wires and see if it runs the motor.
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Air conditioning and blower stopped working, all fuses checked good.Is there a common feed to these two circuits?


The answer is that there is dirt dust and fuzz built up in the brushes of the blower motor. Had to figure this one out myself. Remove glove box, carefully disassemble bottom of blower motor, remove brush cap and brushes clean up mess and reassemble. Not for a novice but if you're a thinker you can figure it out. Mine has worked every time since. The Pontiac guys had no clue wanted to replace motor.

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2003 Suburban heater fan will not working.


three things left to check,
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1 Answer

Blower motor does not run, fuse good-resistor good- motor runs when jumped with 12 volts


check the wire going to the blower for power- test light should dim and brighten as you turn the knob from fast to slow (goes through the resistor). If good -make sure you have a good ground from the wire going to the blower.

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Air Conditioner blower motor resistor was replaced 2 years ago when ac blower stopped working. Blower is not workinga again, i replaced the blower motor resistor (behind glove box) and still not working....


Motor is also energized by a relay. check that and also check that the motor itself is good by running a hot lead right to it. I'm sure you already checked the fuse and know the switch is good?

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1 Answer

99 cougar blower motor problems


Use the diagram at the link below. First check fuses 23 and 37. If good, pull out the blower relay and probe the relay socket with a voltmeter or test light. Turn the key on and turn the blower switch to high. There should be two hot terminals in the relay socket. If good, move your red lead to battery positive and probe the other two terminals. One should be solid ground and the other should show a few volts. If all good, push the relay back in to see if it clicks. If it clicks, move to the blower motor connector. Put your black lead to chassis lead to ground and probe the terminal with the purple wire. It should be hot. If yes, the problem is at the switch. Verify that yhe switch is getting ground on the black wire at the control head connector.
If you can run these tests, you will find the problem. Let me know if you get stuck.



http://www.revbase.com/BBBMotor/Wd/DownloadPdf?id=16596

Aug 11, 2017 | 1999 Mercury Cougar

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