1992 airbag back up battery

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1992 airbag back up battery

Postby Hotrodjrod » Thu Dec 07, 2017 2:12 am

I just recently took on the task to replaced the clockspring in my Mark. Went in to disconnect the backup battery and there was just the module. I looked as much as I can without dismantling the dash for the connection plug or loose wires with nothing to show. Am I overlooking something, has anyone else experienced this?


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Re: 1992 airbag back up battery

Postby CDW6212R » Thu Dec 07, 2017 6:53 pm

I've never heard of a back up battery for these air bags. Be sure to have the car battery disconnected for a while before unplugging the air bag. Then it's fairly simple to remove, two bolts and the connector. The clock spring is trickier, observe the instructions to install it, to center it that is.
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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Re: 1992 airbag back up battery

Postby 2manymarks » Fri Dec 08, 2017 12:18 am

:? Just curious......anybody ever have one of those bags deploy? 8-)
As of July2017, 11 Mark[*] VII's, 3 licensed for the road:
1989 LSC Midnight/Current Red c/c (9G) mostly stock 99k.
1989 LSC Midnight/Current Red c/c (9G) 124k, stock, needs air suspension & bodywork.
1989 Light Titanium c/c (11) Bill Blass - stock. miles unk
1989 LSC Medium Sandalwood (62) Mass air+ 111k FOR SALE $900.
1986 BB (8T) stock 125k (wife'sDD)
1987 BB (4L) stock (miles unk)
1987 Base Model White (9L) 107k (2.73rear)
1984 Turbo Diesel Base model, Platinum (1Q), 131k+ FOR SALE $1000.
Parts cars: 88 LSC, 89 BB, 90 LSC - TLZ 5spd (complete conversion w/extras 4SALE)
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Re: 1992 airbag back up battery

Postby K MANIAC » Fri Dec 08, 2017 12:53 am

I have removed the airbag (SRS) module from a 1992 Town Car, which is a blue box behind the glove box. I would expect the module in a Mark to be much different. No separate back up battery. I suspect an energized capacitor within the module that discharges slowly over time after the battery is disconnected. I expect the capacitor is in the module.
"This car may be old, but it will still climb Kirker Pass at 110!"- quote of the original owner of my green 1964 Chrysler 300-K

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1989 Mark VII Bill Blass (Oxford White)
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1989 Mark VII LSC (Sandstone Metallic)
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Re: 1992 airbag back up battery

Postby oldschool1 » Sat Dec 09, 2017 4:16 pm

Hotrodjrod wrote:I just recently took on the task to replaced the clockspring in my Mark. Went in to disconnect the backup battery and there was just the module. I looked as much as I can without dismantling the dash for the connection plug or loose wires with nothing to show. Am I overlooking something, has anyone else experienced this?


1992 LSCse Catwoman

The 1990 and 1991 EVTMs 46-3, show an
AIR BAG BACKUP POWER SUPPLY,
CONNECTOR, C278,
LOCATION, Behind RH side of I/P, near T/O to glove compartment lamp

It's probably near the location that KManiac gave. I do not have an 1992 manuals.
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Re: 1992 airbag back up battery

Postby CDW6212R » Sat Dec 09, 2017 10:10 pm

I'll bet it's a capacitor module, plugs in, as KManiac suggested. I think all shop procedures for these older Fords all say to disconnect the battery and wait 15, to up to 30 minutes, before removing the airbags. My friend and I have taken apart three 90-91 Mark VII's, and several 84-89's, doing that. No troubles.
Don
1991 Red Special Edition, my 2nd SE, dead paint, DWS 255/45/17's on 95 Cobra wheels, and soon; DVD/Navi/backup camera, OBDII and the 347, before custom paint.
98 Mountaineer with Continental DWS 255/55/18's, big sway bars, custom brakes. Soon to be A4WD with XP8 bumpers and wing.

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