![]() ![]() So I'm suspicious of the lower voltage I measured in my Grand Marquis versus my Crown Vic. I have a similar blower motor layout in a well maintained 1997 Ford Crown Victoria (without EATC) and that voltage reading was 13-14 volts whether the fan speed control was set on low or high. It read anywhere from 1 to 6 DC volts or so. I then measured the voltage being applied to the blower motor itself under the hood. ![]() I even swapped them out with other working relay and fuses in the power distribution box. I have checked the obvious including the inside passenger compartment fuses plus the power distribution box underneath the front hood with particular attention to both the blower motor relay and blower motor fuses. I have a similar problem with a 2003 Mercury Grand Marquis LSE with climate control (Electronic Automatic Temperature Control or EATC for short). I have read thru another post in this forum about heater and a/c blower motors that stopped working suddenly. Where can I find the blower motor control? These are exact discriptions of what I have experienced. Right now I have it tie-wrapped to something under the hood but the heat sink on the Power Transistor gets REAL HOT - I think the best place in it is back inside that Heater/AC Box. Now all I have to do is re-install the Board into the Heater/AC Box - a real tight squeeze. When I plugged the Board into the harness I found I have a Blower that once again works under control of the EATC! I heated-up the pins at all 5 connector lugs and flowed a little solder into the "gaps" around the pins. Sure enough, I could see that the solder was cracked at one of the big lugs of the connector! On my last search of the Forums I turned-up a note from a fellow who said "most guys just fix it with a little bit of solder" this turned-on a lightbulb for me and today I had a look at the solder-joints where the connector is attached to the Controller Board. After running with the Blower hot-wired thru a toggle switch for six months (when the intermittent problem went to complete failure)I finally got around to pulling the Controller Board out of the Heater/AC box last week. I have been searching the Forums on and fiddling around with the EATC System Blower Motor Controller circuit on our 2001 GM LS for a year trying to solve the (initially) intermittent operation of the Blower for a year. It should only take 30 minutes to remove the blower motor, and doesn't really need special tools, a 8mm or 5/16 socket, ratchet and a couple of extensions. You could have a blower speed controller stuck, or switch that is bad, but the first thing to do is take the blower motor out and check the cage on it, and then look inside to make sure thatt there isn't anything restricting air as it blows thru the evaporator core, I have seen mice make nests in blower motors and in the case area. The blower motor is under the hood area on the right side, it has 3 bolts holding it in, and wiring on top of it. Is that true? I would appreciate anyones input or suggestions since winter is almost here, and I am freezing when I first start my car. If so, what does it take to fix it? Will it be very expensive? My brother said the whole dash will have to come out to get to it. ![]() It heats up and cools, but even on high, it just barely blows like it is set on low. Question : What is wrong with my cars heat and air? I have a 2001 Mercury Grand Marquis? I've been doing some research online and think it could be the blower speed controller ![]()
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