Blower resistor or relay trouble

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Old Dec 19, 2010 | 05:33 PM
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shawn489's Avatar
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Blower resistor or relay trouble

My resistor has continity everywhere on it so I think it might be OK, but the blower does not run on high so I was thinking it could be the relay. Can anyone tell me where the blower relay is on a 2002 150. I read some where that it is 4" from steering column and 3" from the lighter. PLEASE HELP!!!!! me locate the relay and how should I test it?
 
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Old Dec 19, 2010 | 05:55 PM
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From: Under the flightpath of old ORD 22R
Is the system an EATC ( Electronic Automatic Temp Control ) or MTC ( Manual Temp Control ) ?

If the blower runs on the lower speeds, I would say the relay is fine ( else the blower would get no power at any speed setting ).

The blower motor resistor has nothing to do with running the blower on high, the resistor has 3 values for lo, medium lo and medium high.

The function selector switch bypasses the blower motor resistor on the high setting.
The test for the high speed on the blower motor is on the back of the function selector switch, when you turn the fan setting to the high position, the Orange w/ black stripe wire to the black wire should have close to 0 ohms of resistance to it.

PS : Stop cross posting threads in multiple forums, this is the 2nd time you have done this. Makes diagnosing the issue that much harder.
 
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