need elec. help

redalert89 · July 9th, 2007, 11:00 PM

i have an 84 stang 5.0. i bought it about two weeks ago bone stock. its kind of temper mental but all things electrical would flash when the car was started. then it would only happen when i turned my headlights on. well now i had best buy put an aftermarket stereo in it and when the car is running everything flashes really bad. whats weird..everything works great when i turn the key to acc. as soon as i start it, it flashes again. i dont even know where to look any help would be greatly appreciated. thanks in advance.

C MY 4D · July 9th, 2007, 11:33 PM

Is there an alarm under the dash? Maybe there is one in there and someone just cut out the speaker.

redalert89 · July 10th, 2007, 10:20 AM

no there isnt an alarm, someone has suggested the ignition harness. does anyone else have suggestions?

C MY 4D · July 10th, 2007, 10:26 AM

I have only seen one car do something like that it was from water getting into the BCM from a leaking windsheild. But the car was a 97 which is quite a bit different than a 84.

neverfastenough1 · July 10th, 2007, 10:30 AM

Not that I have any ideas, but when you say all electrical, are you talking about the dash, or other stuff too?

fogged306 · July 10th, 2007, 10:35 AM

Check your power connections, grounds. Have the battery and alternator tested.

redalert89 · July 10th, 2007, 10:45 AM

dash, radio, headlights, taillights, interior lights - i will have auto zone test them today. but you would think that it would still flash when the ing. is on acc.

fogged306 · July 10th, 2007, 11:02 AM

The voltage regulator in the alternator could be bad, the ground from the block to the battery could be bad, the power connections could be loose enough to the point where the engine idling is making them rattle.

I'm not saying this is exactly whats going on but its a good place to start looking.

neverfastenough1 · July 10th, 2007, 11:06 AM

I can tell you that all that stuff is connected in some way to the instrument cluster wiring, and that in acc you don't send any power to the instrument panel, only when the ignition is in the on position. Good luck with it. Hope they can trace your problem.

fogged306 · July 10th, 2007, 11:17 AM

Originally Posted by neverfastenough1

I can tell you that all that stuff is connected in some way to the instrument cluster wiring, and that in acc you don't send any power to the instrument panel, only when the ignition is in the on position. Good luck with it. Hope they can trace your problem.

He makes a good point... does this do it in the ign. position with the car off?

redalert89 · July 10th, 2007, 11:17 AM

i have replaced the ground cable from block to batt. didnt work. im heading to auto zone now!

redalert89 · July 10th, 2007, 12:14 PM

no it does not do it in the ign. position, but i just had the alt. tested and he said that it was charging too good at idle and he thought it could be the voltage reg. i picked one up, ill post with the results!!

redalert89 · July 10th, 2007, 01:08 PM

def. didnt work

C MY 4D · July 10th, 2007, 05:36 PM

I forgot .......... ignition switch.... there was a recall on those for burning up. check the switch and the pigtail. napa sells them both.

fogged306 · July 10th, 2007, 06:29 PM

Originally Posted by redalert89

no it does not do it in the ign. position, but i just had the alt. tested and he said that it was charging too good at idle and he thought it could be the voltage reg. i picked one up, ill post with the results!!

please tell me you mean't to say "wasn't charging too good at idle"... cause if not, that guy at autozone just pulled a fast one on you.

also if thats the case, with the problem happening with the ign. on and the car not running, then you have a possible short in something thats tied into the ign only. You will have to isolate the circuit. the simplest thing to start with is turn the ign on and pull one fuse at a time from your fuse box. if you pull a fuse and it stops, you have found the circuit and now you have to narrow it down inside that circuit... this may not work but its an easy start.

redalert89 · July 11th, 2007, 03:07 PM

Originally Posted by C MY 4D

I forgot .......... ignition switch.... there was a recall on those for burning up. check the switch and the pigtail. napa sells them both.

where is that ignition switch located...also i called ford to check on that recall and he said that the only recall i had on that 84' was a seat belt tounge. not saying your wrong, i will def. chech that out. someone told me that before but i dont know where it is. thanks for your imput guys!

C MY 4D · July 11th, 2007, 04:28 PM

Its on the bottom side of the column..... its what the key rod moves to start the car. More than likely it has already been replaced for the recall but they still burn up from loose connections in the pigtail. Its best to replace them both at the same time. If the wires aren't burnt up I would just pull the wires out of the pigtail and move them into the new one.

redalert89 · July 11th, 2007, 05:07 PM

ok i got the switch they didnt have the "pigtail" nor did they know what it was so..now how the hell am i supposed to get the switch off they arnt screws they are like flat rivit deals

C MY 4D · July 11th, 2007, 05:30 PM

They should be torques head. If they are rivits you need to drill them out post a picture of the part.

C MY 4D · July 11th, 2007, 05:32 PM

They are FOS here is a link to the harness..... http://www.napaonline.com/masterpage...itch+Connector

July 9th, 2007, 11:00 PM	#1
redalert89 Regular Join Date: Feb 2007 Posts: 55 iTrader: 0 reviews	need elec. help i have an 84 stang 5.0. i bought it about two weeks ago bone stock. its kind of temper mental but all things electrical would flash when the car was started. then it would only happen when i turned my headlights on. well now i had best buy put an aftermarket stereo in it and when the car is running everything flashes really bad. whats weird..everything works great when i turn the key to acc. as soon as i start it, it flashes again. i dont even know where to look any help would be greatly appreciated. thanks in advance.

July 9th, 2007, 11:33 PM	#2
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	Is there an alarm under the dash? Maybe there is one in there and someone just cut out the speaker. __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

July 10th, 2007, 10:26 AM	#4
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	I have only seen one car do something like that it was from water getting into the BCM from a leaking windsheild. But the car was a 97 which is quite a bit different than a 84. __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

July 10th, 2007, 10:30 AM	#5
neverfastenough1 Hardcore Enthusiast 2002 Mustang GT Join Date: May 2007 Location: Savannah, Ga Posts: 2,789 iTrader: 3 reviews	Not that I have any ideas, but when you say all electrical, are you talking about the dash, or other stuff too? __________________

July 10th, 2007, 11:06 AM	#9
neverfastenough1 Hardcore Enthusiast 2002 Mustang GT Join Date: May 2007 Location: Savannah, Ga Posts: 2,789 iTrader: 3 reviews	I can tell you that all that stuff is connected in some way to the instrument cluster wiring, and that in acc you don't send any power to the instrument panel, only when the ignition is in the on position. Good luck with it. Hope they can trace your problem. __________________

July 10th, 2007, 10:20 AM	#3
redalert89 Regular Join Date: Feb 2007 Posts: 55 iTrader: 0 reviews	no there isnt an alarm, someone has suggested the ignition harness. does anyone else have suggestions?

July 10th, 2007, 10:35 AM	#6
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	Check your power connections, grounds. Have the battery and alternator tested.

July 10th, 2007, 10:45 AM	#7
redalert89 Regular Join Date: Feb 2007 Posts: 55 iTrader: 0 reviews	dash, radio, headlights, taillights, interior lights - i will have auto zone test them today. but you would think that it would still flash when the ing. is on acc.

July 10th, 2007, 11:02 AM	#8
fogged306 MM Fanatic 89 GT Join Date: Apr 2007 Location: NY Posts: 4,875 iTrader: 2 reviews	The voltage regulator in the alternator could be bad, the ground from the block to the battery could be bad, the power connections could be loose enough to the point where the engine idling is making them rattle. I'm not saying this is exactly whats going on but its a good place to start looking.

July 10th, 2007, 11:17 AM	#11
redalert89 Regular Join Date: Feb 2007 Posts: 55 iTrader: 0 reviews	i have replaced the ground cable from block to batt. didnt work. im heading to auto zone now!

July 10th, 2007, 12:14 PM	#12
redalert89 Regular Join Date: Feb 2007 Posts: 55 iTrader: 0 reviews	no it does not do it in the ign. position, but i just had the alt. tested and he said that it was charging too good at idle and he thought it could be the voltage reg. i picked one up, ill post with the results!!

July 10th, 2007, 01:08 PM	#13
redalert89 Regular Join Date: Feb 2007 Posts: 55 iTrader: 0 reviews	def. didnt work

July 10th, 2007, 05:36 PM	#14
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	I forgot .......... ignition switch.... there was a recall on those for burning up. check the switch and the pigtail. napa sells them both. __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

July 11th, 2007, 04:28 PM	#17
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	Its on the bottom side of the column..... its what the key rod moves to start the car. More than likely it has already been replaced for the recall but they still burn up from loose connections in the pigtail. Its best to replace them both at the same time. If the wires aren't burnt up I would just pull the wires out of the pigtail and move them into the new one. __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

July 11th, 2007, 05:07 PM	#18
redalert89 Regular Join Date: Feb 2007 Posts: 55 iTrader: 0 reviews	ok i got the switch they didnt have the "pigtail" nor did they know what it was so..now how the hell am i supposed to get the switch off they arnt screws they are like flat rivit deals

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July 11th, 2007, 05:30 PM	#19
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	They should be torques head. If they are rivits you need to drill them out post a picture of the part. __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

July 11th, 2007, 05:32 PM	#20
C MY 4D Billy Weston 2003 Cobra 11.14@124.36 Join Date: Aug 2006 Location: Hampton, VA Posts: 4,806 iTrader: 8 reviews	They are FOS here is a link to the harness..... http://www.napaonline.com/masterpage...itch+Connector __________________ TT Build in progress....... Need work done to your car for a great price in Hampton Roads? Shoot me a PM.

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