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Ford Crown Victoria/Mercury Grand Marquis Electrical/Lighting

245 messages,  Last post on Mar 25, 2013 at 6:34 PM

You are in the Ford Crown Victoria/Mercury Grand Marquis Forum.

What is this discussion about? Ford Crown Victoria, Mercury Grand Marquis, Lights, Electrical, Sedan

Messages Page 20 of 25

#189 of 245 Re: No power to data link. [videoparadise] by Mr_Shiftright HOST

Apr 14, 2011 (10:49 am)

Replying to: videoparadise (Apr 14, 2011 10:23 am)
Well yeah the problem does come up but often, say on most GM cars, there's a fuse that controls it. If there isn't, then someone has to test the various pins in the connector link and figure out why there's no power to the data link. These systems are not as standardized as one might think. I have heard that on some cars when certain components fail they will also knock out the data link, but again, I can't find anything specific to your make and model.

#190 of 245 Re: 2000 Mercury Grand Marquis electrical problems [swrboo] by suavemike

May 26, 2011 (7:49 am)

Replying to: swrboo (Sep 05, 2010 7:20 pm)
Did you figure out what the issue was? I am having the exact same problem. A dime fell into my 12v cig lighter and shorted it out. I replaced the fuse to the cig lighter but now my dome lights, headlights, and clock don't work. Turn signals and radio and everything else work fine. Just the same as your vehicle. So I'm guessing what ever it is that shorted out is the same on both our vehicles. Any info would be greatly appreciated!!!

#191 of 245 Re: 2000 Mercury Grand Marquis electrical problems [suavemike] by fordgirl4

May 26, 2011 (8:23 am)

Replying to: suavemike (May 26, 2011 7:49 am)
I spent around a grand and still had the same problem. I ended up just taking the bulb out of the dome lignts, ant turning the light switch to off. I still have a dome light if I turn the switch on, so I have not had to worry about the dome light and lights coming on during the night and running my battery down. I realize this is not a fix, however it was cheap and it works!

#192 of 245 Re: 2000 Mercury Grand Marquis electrical problems [fordgirl4] by euphonium

May 26, 2011 (12:50 pm)

Replying to: fordgirl4 (May 26, 2011 8:23 am)
"I ended up just taking the bulb out of the dome lignts, ant turning the light switch to off. I still have a dome light if I turn the switch on"
 
If the bulb is out of the dome, how do you get a light from just turning the switch on???

#193 of 245 Re: 2000 Mercury Grand Marquis electrical problems [swrboo] by swrboo

Jun 08, 2011 (11:00 am)

Replying to: swrboo (Sep 05, 2010 7:20 pm)
Ok, I am still having electrical problems but I have narrowed it down to what I see might be the culprit. I keep blowing the big 40 amp fuse under the engine compartment that controls the headlights, parking lights, dome light, clock, and cigarette lighter and power point. BUT, I also have noticed that it seems to only blow when I leave my GPS plugged in. After a few days I can tell its getting ready to blow because the power light on the GPS goes out first. I have replaced the cord for the GPS and have plugged it into the power point rather than the cigarette lighter but still the same problem. I am thinking I have a short in the cigarette lighter somewhere. But does a short there affect the power point too? And if this is the case, where do I start to look for it? It doesn't blow the fuse in the car, just the one under the hood.

#194 of 245 Re: 2003 Mercury Grand Marquis Headlights Go Off While Driving [hdave7] by mrsrichmond

Jun 16, 2011 (6:16 pm)

Replying to: hdave7 (Jun 26, 2010 8:59 pm)
I had the same exact problem and i can assure u that it the head light control module(lcm) the part cost 511 new but i got a used one for 50 dollars!!!! I drove my car almost two years before i fixed it, i just drove holding the bright lights which worked just fine until i fixed the problem.

#195 of 245 Re: head light go 2004 crown vic. [houselight] by beach_bob

Oct 01, 2011 (4:06 am)

Replying to: houselight (Feb 26, 2009 7:54 pm)
I found the problem to be a defective relay within the lighting control module. My dealer will replace the module for about $900.00, first diagnostic, then program the module and install it. The part can be obtained from Mouser Electronics online for under $6.00. If you can solder it is a simple task, just locate the module which is found mounted under the lower dashboard to the passenger side of the steering column. Three plugs must be removed after you slide it out of the mounting tray. Open it up and you find four identical relays. The headlight relay is on the side opposite the long heat sink and nearest the vehicle connectors. OEM p/n NEC EQ1-11111S. There is another post here with great photos which guided me. Look for discoloration on the PC board from the heat generated by the arcing contacts.
Good luck.

#196 of 245 Clock, dome light, radio buttons, temp control display by jvpeach

Nov 11, 2011 (8:02 am)

I have an '03 Crown Victoria and the power door locks button quit working last night along with the dome light, clock, & overhead display. The radio works but the buttons do night light up for it and the temp control buttons do not light up either nor do the ac, defrost, etc. selection buttons which means no heat or ac right now (or defrost). This is the second time this has happened. First time mechanic had it 5 days and couldn't figure it out (checked all fuses and they appeared ok). A random guy from church looked at it next and got all working other than overhead display but didn't tell me what he did. Cigerette lighter works still but even the lights on the visors are out. UGH! Any help is greatly appreciated!

#197 of 245 Re: head light go 2004 crown vic. [beach_bob] by tstacks1

Nov 15, 2011 (9:16 am)

Replying to: beach_bob (Oct 01, 2011 4:06 am)
I cant find the other post you mentioned that has the great pictures and I was hoping you could tell me what number post to look at I am trying to fix this same problem on my dads car and would really like to see the pics before I begin. thanks in advance for any help you might provide.

#198 of 245 2000 CROWN VIC P71 BATTERY DISCHARGE/NO DATA LINK by djmrkb89

Dec 04, 2011 (11:39 am)

I HAVE A '00 VIC P71 & HAVE TO UNHOOK BATTERY AT NIGHT OR POSSIBLE NO START IN THE MORNING. BATTERY & ALT. TESTED GOOD IN & OUT OF CAR. FUSES GOOD. HAS ROUGH IDLE IN THE MORNING TILL WARM. SCANNED & GOT NO DATA LINK MESSAGE. ALL LIGHTS WORK BUT THE RED ONES ON THE DOORS & DASH LGHTS ARE DIM. COULD THE COMPUTER UNDER THE DASH BE THE PROB OR WHAT??

Messages Page 20 of 25

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