73 is the best number.
Modern voltmeters, even the cheap-o ones, are auto-polarity so it's almost impossible to test wrong. Put the voltmeter on DC, plugs the leads into the connector, and read the voltage on the display...it'll be either + (or -) 12V, or it will be very low (or zero).Originally Posted by ammolance
The Blackbird
Trilogy #61
Driveway Queen
The Spruce Goose
2004 Grand Marquis LS Limited Edition
Daily Driver
Member
ok. Well, contacted a somewhat mechanic savvy buddy who is gonna check the voltage for me. We'll go from there!
Member
OK. So we jumped in to the MM for a drive since it was nice out. Wife touched the "Automatic" button and the air came right on. I touched the norm a/c, max a/c, floor, floor/def, etc and all worked flawlessly. Got to our destination, turned the MM off, had lunch, jumped in, and nothing. My mechanically inclined buddy said he thinks its the BCM (blower control module), and the schematic I got from O'Reily's says theres a "front blower motor" (C1227) (round thing with the nipple), an "automatic temp control sensor" (C1338), a "front blower motor resistor assembly" (C1349) (small rectangle thing under some lines), and a thing not labeled on top of the blower motor that's not labeled (C1147). Looks like it's a schematic from Ford so hopefully someone can tell me if my bud is right on the "BCM" and what that translates to on the schematic?
Weißbirke Plünderer
go to the DIY forum and there is a thread about the BCM with pics.
2004 SB Ported Trilogy 48
Has supporting mods and stuff
Thanks to Marty O for his help in updating this car.
R.I.P.
Rex "SC Cheesehead"
Member
Found this thread: http://www.mercurymarauder.net/forum...c+blower+motor
Went out and tapped on the BCM and magically the air starting flowing. Looks like a little bit of a bear to get to, and I think in a link posted earlier by y'all there were some instructions on how to get at it. Ford wanted $132, O'Reily wanted $74 for Motorcraft. Same same?
Weißbirke Plünderer
same, the 5th thread in DIY forum is BCM installation. not the thread you posted up.
2004 SB Ported Trilogy 48
Has supporting mods and stuff
Thanks to Marty O for his help in updating this car.
R.I.P.
Rex "SC Cheesehead"
Member
Cool. Would like to save a few bucks, plus I got an O'Reily coupon. Correct me if I'm wrong, but here's the link: http://mercurymarauder.net/forums/sh...ad.php?t=48707
Wish me luck!
Weißbirke Plünderer
save old bcm, member fastblackmerc can repair so you have a spare.
2004 SB Ported Trilogy 48
Has supporting mods and stuff
Thanks to Marty O for his help in updating this car.
R.I.P.
Rex "SC Cheesehead"
73 is the best number.
The Cxxxx numbers are connectors. They are in fact for the parts you called out.
C1349 is correct for the BMSC...the Ford manual generically calls it a blower motor resistor assembly as that's what it actually is in cars with manual HVAC control. In cars with EATC it's replaced with the Blower Motor Speed Control module.
You can ignore C1147...that a 12-pin connector for multiple circuits.
The Blackbird
Trilogy #61
Driveway Queen
The Spruce Goose
2004 Grand Marquis LS Limited Edition
Daily Driver
Member
OK. This BCM finally tanked. Is it now part number C1349 (Front blower motor resistor assembly) and also contain part number C1308 (Front blower motor speed controller)? Thanks in advance for the clarification!
Member
If I would have only looked a few posts above! Thanks again everyone!
Everything Marauder, LEDs & HI
A stated previously I have repaired BCMs available. Even if you replace it with a Ford one it will crap out again.
PM me for details.
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