1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Discussion of STOCK anti-theft system, charging system, connections, fuses, grounds, ignition system, lighting system, relays, sensors, switches, wiring systems.

1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby oldschool1 » Mon Jan 12, 2009 3:34 am

1984 1985 1986 1987 1988 1989 Lincoln Mark VII Ignition Switch
Motorcraft Switch 714093 (pn: F29Z-11572-D)

The ignition switch is mounted inside the steering column assembly, on the lock cylinder housing, and is controlled by the lock cylinder through a pin, which is part of the actuator assembly. Most of the vehicle's major electrical systems are powered through this switch. This switch has a finite life and should be replaced before it becomes weak and separates the halves.

ALL ORIGINAL IGNITION SWITCHES SHOULD BE REPLACED.

Bad ignition switches have a gap between the plastic and metal halves. This gap raises the resistance in the battery, accessory, and ignition circuits causing them to malfunction and fail.

Good ignition switches have no gap.

Signs of a bad or failing ignition switch may include, but are not limited to:
TripMinder erratic
radio erratic
overhead console erratic
factory alarm triggers without being tripped
trouble engaging starter
starter remains engaged (also see Starter Solenoid)
warm or hot ignition key and cylinder

REMOVAL

Disconnect the battery.
1. Remove the steering column shroud by removing the two screws holding the upper and lower shroud halves together.
2. Remove the collar by pulling it away from the dash.
3. Remove the two ignition switch bolts using a super torx T-25 driver.
4. Disconnect the ignition switch connector.

This switch came out of a 1988 LSC with LESS THAN 28,000 miles on the odometer! Note the gaps!

ImageImageImage

Also see:

http://www.thelincolnmarkviiclub.org/documents/tech/1984ignitionSwitch.pdf

http://www.thelincolnmarkviiclub.org/documents/tech/1988-1989IgnitionSwitch.pdf
User avatar
oldschool1
CLUB MEMBER
 
Posts: 8702
Joined: Fri Dec 26, 2008 10:01 pm
Location: Primos, Pennsylvania USA

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby fremar68 » Tue Feb 17, 2009 12:50 am

Ignition Switch:

John:

Are any of the symptons you listed also applicable to the 1990-1-2 Model Mark VIIs??? I know they have a different type Ignition Switch, but....one never knows, does one???

Fred D.
The Chairman
fremar68
BOARD MEMBER
 
Posts: 590
Joined: Sat Dec 27, 2008 12:46 pm
Location: Odenton, Maryland

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby oldschool1 » Wed Mar 18, 2009 8:10 pm

fremar68 wrote:Ignition Switch:

John:

Are any of the symptons you listed also applicable to the 1990-1-2 Model Mark VIIs??? I know they have a different type Ignition Switch, but....one never knows, does one???

Fred D.
The Chairman

I found a redesigned and more robust ignition switch in my 1990's Mark VIIs.

I have not heard of any problems related to the 90's Mark VII ignition switches.
User avatar
oldschool1
CLUB MEMBER
 
Posts: 8702
Joined: Fri Dec 26, 2008 10:01 pm
Location: Primos, Pennsylvania USA

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby Henry3 » Mon Mar 16, 2015 4:18 pm

Hello list,

I experienced a very hot key and switch in my 1990 MK7 with 36700 miles on it. This is the first time in 25 years of ownership. Time to replace the switch?
User avatar
Henry3
REGISTERED USER
 
Posts: 2
Joined: Mon Mar 16, 2015 4:04 pm

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby 2manymarks » Mon Mar 16, 2015 5:02 pm

Henry3 wrote:Hello list,

I experienced a very hot key and switch in my 1990 MK7 with 36700 miles on it. This is the first time in 25 years of ownership. Time to replace the switch?


Sounds like maybe a little past time.
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)
User avatar
2manymarks
CLUB MEMBER
 
Posts: 1223
Joined: Sat Dec 27, 2008 4:24 pm
Location: Coastal NC-the Right Coast

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby CDW6212R » Mon Mar 16, 2015 9:21 pm

2manymarks wrote:
Henry3 wrote:Hello list,

I experienced a very hot key and switch in my 1990 MK7 with 36700 miles on it. This is the first time in 25 years of ownership. Time to replace the switch?


Sounds like maybe a little past time.


Yes, but first disconnect the battery, quick. That's a fire hazard, not quite as bad as the brake sensors recalled, but the same issue, a short of some kind. Take care with it.
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.

ImageImage
User avatar
CDW6212R
CLUB MEMBER
 
Posts: 5451
Joined: Wed Feb 09, 2011 11:57 pm
Location: Near Dollywood in TN

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby Henry3 » Tue Mar 17, 2015 3:11 pm

Thanks for the advice, now where can I find a replacement ignition switch?
User avatar
Henry3
REGISTERED USER
 
Posts: 2
Joined: Mon Mar 16, 2015 4:04 pm

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby 2manymarks » Tue Mar 17, 2015 3:49 pm

Henry3 wrote:Thanks for the advice, now where can I find a replacement ignition switch?


Might try the OEM part in this case. They have been available at parts stores also. 8-)

(For clarification, the switch is not the part where the key goes, but under it). :?
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)
User avatar
2manymarks
CLUB MEMBER
 
Posts: 1223
Joined: Sat Dec 27, 2008 4:24 pm
Location: Coastal NC-the Right Coast

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby oldschool1 » Fri May 29, 2015 11:36 pm

Ignition Switch Revisited

Since PINKIN went over 25,000 miles, I figured that is at least 2,500 starts sooo, time to change a twenty-nine year old ignition switch.

At least 1986 Base Model Lincoln Mark VIIs still left the factor with Security bolts.
You do not have the required permissions to view the files attached to this post.
User avatar
oldschool1
CLUB MEMBER
 
Posts: 8702
Joined: Fri Dec 26, 2008 10:01 pm
Location: Primos, Pennsylvania USA

1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby oldschool1 » Wed Jun 29, 2016 6:11 pm

Image
Our Ford Ignition Switches can be purchased over the counter at AutoZone, PepBoys, Advanced Auto, etc.
Look for Duralast or Wells brand Ignition Switch Part Number: LS514

Less than $25.00US shipped to your door in the continental US.
User avatar
oldschool1
CLUB MEMBER
 
Posts: 8702
Joined: Fri Dec 26, 2008 10:01 pm
Location: Primos, Pennsylvania USA

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby kaley200 » Sat Jul 09, 2016 3:06 pm

OLDSCHOOL,I went and got the super torq (STAR) T25 and removed the cover to get at the ignition switch. On my 87 Mark I had to remove 3 screws not two to get off the cover. The first screw on the ignition switch itself (nearest the steering wheel) came out easy. The second one, I could not get on to remove. The dash is in the way even though the screw to be removed is easily visible. Is there a special right-angle tool that you did not mention or do I also have to tear part of the dash off to access this screw?.....BUD
User avatar
kaley200
REGISTERED USER
 
Posts: 31
Joined: Thu Oct 08, 2015 10:11 pm
Location: birmimgham,michigan

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby kaley200 » Tue Jul 12, 2016 2:20 am

Old school, maybe my particular car had the switch set a bit further back than most. I have a friend who when I mentioned my problem said he had a driver with a flexible thin shaft and VOILA the screw was out and back in with a new ignition switch in a minute. So, thanks for your info. I am sure it has been invaluable to many Mark owners. Just as a quick aside, I was then testing the brakes a bit harshly since they were feeling a little soft, and suddenly they went to the floor and smoke came pouring out from undet the hood (passenger side). Large puddle of brake fluid under the spot so I think I blew a brake line. Will find out tomorrow. THANKS AGAIN.....BUD
User avatar
kaley200
REGISTERED USER
 
Posts: 31
Joined: Thu Oct 08, 2015 10:11 pm
Location: birmimgham,michigan

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby CDW6212R » Tue Jul 12, 2016 2:07 pm

Good catch to discover the brake line and not hit anything. Replace the brake hoses in pairs, or all of them given the age. They don't cost much, but placing the special copper washers carefully and tightening the fittings, that is the hardest part. Go slow and double, and triple check for leaks at the copper washer connections. They do need extra tightening sometimes.
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.

ImageImage
User avatar
CDW6212R
CLUB MEMBER
 
Posts: 5451
Joined: Wed Feb 09, 2011 11:57 pm
Location: Near Dollywood in TN

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby oldschool1 » Wed Jul 13, 2016 10:14 pm

kaley200 wrote:OLDSCHOOL,I went and got the super torq (STAR) T25 and removed the cover to get at the ignition switch. On my 87 Mark I had to remove 3 screws not two to get off the cover. The first screw on the ignition switch itself (nearest the steering wheel) came out easy. The second one, I could not get on to remove. The dash is in the way even though the screw to be removed is easily visible. Is there a special right-angle tool that you did not mention or do I also have to tear part of the dash off to access this screw?.....BUD

How's this Bud?

Image

Alternatively, the trim can be easily removed.
User avatar
oldschool1
CLUB MEMBER
 
Posts: 8702
Joined: Fri Dec 26, 2008 10:01 pm
Location: Primos, Pennsylvania USA

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby oldschool1 » Wed Jul 13, 2016 10:18 pm

kaley200 wrote:Old school, maybe my particular car had the switch set a bit further back than most. I have a friend who when I mentioned my problem said he had a driver with a flexible thin shaft and VOILA the screw was out and back in with a new ignition switch in a minute. So, thanks for your info. I am sure it has been invaluable to many Mark owners. Just as a quick aside, I was then testing the brakes a bit harshly since they were feeling a little soft, and suddenly they went to the floor and smoke came pouring out from undet the hood (passenger side). Large puddle of brake fluid under the spot so I think I blew a brake line. Will find out tomorrow. THANKS AGAIN.....BUD

Glad to read that you got it out.

Flexible extensions are worth their weights in gold.

Image
User avatar
oldschool1
CLUB MEMBER
 
Posts: 8702
Joined: Fri Dec 26, 2008 10:01 pm
Location: Primos, Pennsylvania USA

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby robertbweltzien » Thu Jul 14, 2016 8:36 am

I used a small, very sharp chisel to remove and re-install the two switch screws.

Bob
Medicine, Biomedicine, Mechanics and MK VIIs
User avatar
robertbweltzien
CLUB MEMBER
 
Posts: 484
Joined: Tue Oct 16, 2012 4:51 pm
Location: Connecticut

Re: 1984 1985 1986 1987 1988 1989 Mark VII Ignition Switch

Postby MKVII » Thu Mar 23, 2017 6:24 pm

I'm not sure, if my ignition switch has already been replaced years before the car was shipped to Europe. But in my case the switch failed with several serious problems over time.

There are a few more signs signaling to exchange the switch at once:
- Turn signal interrupted or sometimes not working (bad, if others don't recognize you want to turn)
- High or erratic engine idle (cite taken from the shop manual and confirmed)
- Digital console sometimes erratic or switching off during ride
- Fuel display or DTE (distance to empty) erratic with fuel tank not empty

Not changing the ignition switch may lead to
- Broken voltage regulator (moving ignition switch often to get working turn signal while driving)
- Electric power off during ride

Electric power off during ride may cause a couple of serious up to very dangerous problems:
- Engine off will cut off power steering
- Electrical power off will also cause sudden loss of brake power

If you are not a very experienced driver like me used to use old cars you are in serious danger, if the car cuts power off during ride.
My other car is a Lincoln.
Lincoln Mark VII Continental 1984, Corvette L-82 1979, Pontiac Firebird 1994

ImageImage
User avatar
MKVII
CLUB MEMBER
 
Posts: 92
Joined: Wed Apr 30, 2014 2:36 pm


Return to Electrical

Who is online

Users browsing this forum: No registered users and 1 guest