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1995 Crown Vic blows blinker fuses
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ussessex
User
Jan 23, 2013, 9:09 AM
Post #1 of 10
(9185 views)
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1995 Crown Vic blows blinker fuses
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Hey guys,
I have a 1995 Ford Crown Victoria. It has the 4.6Liter v8 and at the moment, no blinkers!
The inspection sticker is now expired so need to fix it quick.
Heres what I have found; - The Hazzards are on a separate fuse/ relay and work perfectly. All bulbs flash
- The Fuse for the blinkers is blown and has continuity to ground on the service side
- Unplugging the Lighting control module doesnt fix continuity to ground on fuse panel
- I had a spare blinker switch and so replaced it with no change in symptoms
I see that the brake switch also is fed off of this fuse but have not looked at wiring for it yet.
Any ideas will be appreciated.
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Hammer Time
Ultimate Carjunky
/ Moderator
Jan 23, 2013, 9:28 AM
Post #2 of 10
(9180 views)
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Re: 1995 Crown Vic blows blinker fuses
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What fuse are we talking about?
Turn signals and brake lights are never on the same power supply. Brake lights are powered all the time and turn signal are "key on" only.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 23, 2013, 11:19 AM
Post #3 of 10
(9155 views)
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Re: 1995 Crown Vic blows blinker fuses
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Should be fuse (1) 15A. The fuse also protects the circuit for the BOO (brake on/off) switch for the PCM brake pedal status.
Unplug the BOO and check for short to ground at fuse terminal to see if it goes away. If short doesn't go away after unplugging BOO, unplug the turn signal switch and recheck for short to ground.
If the short is there with the BOO and turn signal unplugged, you have a short in the wiring before the BOO and/or turn signal switch.
If this has aftermarket equipment installed that is spliced in to the turn signal, you should check there first.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jan 23, 2013, 11:19 AM)
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ussessex
User
Jan 23, 2013, 7:00 PM
Post #5 of 10
(9126 views)
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Re: 1995 Crown Vic blows blinker fuses
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Well, I disconnected the aftermarket alarm, connector on the brake switch, blinker switch and LCM cable.....Still have continuity from the service side of the fuse to ground.
So D, you mentioned that I now need to trace the wire from the fuse panel to the brake switch and LCM. SHould not be too long of a wire to trace but the back side of the fuse panel is not easily accessible. Is there a diagram availible to tell me what color wire to look for on the LCM?
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 23, 2013, 7:06 PM
Post #6 of 10
(9124 views)
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Re: 1995 Crown Vic blows blinker fuses
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Is fuse 5 the one that is blowing? If fuse 1 was blown the hazards wouldn't work.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Jan 23, 2013, 7:14 PM)
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ussessex
User
Jan 24, 2013, 7:23 AM
Post #7 of 10
(9097 views)
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Re: 1995 Crown Vic blows blinker fuses
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wow! Great catch D!
I looked at the schematic but never questioned that. When I saw the diagram pointed to only one of the 2 feed wires being hot all the time, I assumed that was the one since i blow fuses with key on or off.
Looking at the fuse block diagram below, I would call the fuse in question #16. I will verify this when I get home but am pretty certain that is it.
Strange that is call out that one as the em flashers cause thats still working.
Ill check it and the cigarette lighter wire and report back.
Note: I was unable to make the picture as large as I wanted but you may zoom in on your web browser by holding the "Ctrl" button on your keyboard as you scroll the mouse wheel.
Alternately you may hold the "Ctrl" button and press the plus or minus buttons on the keyboard.
(This post was edited by ussessex on Jan 24, 2013, 7:29 AM)
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ussessex
User
Jan 24, 2013, 4:36 PM
Post #8 of 10
(9075 views)
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Re: 1995 Crown Vic blows blinker fuses
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PROBLEM SOLVED!!!!!!!!
After D pointed out that the fuse in question shared a connection to the cigarrete lighter and not the brake switch, I went back and inspected the lighter. I tried to depress it and thought it felt funny. After a closer look I found out why.
The lighter is located in a depression beyond the ashtray but is on a fairly level surface. THe whole thing pulls out like a drawer and since the lighter is recessed to allow drawer closure, if the lighter is removed, it's easy for things to fall down into the cavity.
Since my son doenst smoke, the ashtray is used for loose change. Need I say more? I found a penny snuggled down neatly inside the hole. Wholla...... A dead short to ground.
Big props to all of you who have shared your time and especially to D, your comments were precisce and on point. A true journeyman of your trade!
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Discretesignals
Ultimate Carjunky
/ Moderator
Jan 24, 2013, 5:28 PM
Post #9 of 10
(9068 views)
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Re: 1995 Crown Vic blows blinker fuses
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I really didn't do anything. It was you that had determined the source of the short. Glad to see that you got it figured out. Thank you for the follow up. May help someone else out someday. 
Closed as solved.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Jan 28, 2013, 8:25 AM
Post #10 of 10
(9013 views)
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Re: 1995 Crown Vic blows blinker fuses
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Glad this is fixed. Take some advice and never use a vehicle's cig lighter. Take it out an plug it. Real cig lighters are about the same since forever and if used for a cigarette will rot and short out.............. T
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