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Topic: Car wont start, possibly IRCM Module? please help (Read 3160 times) previous topic - next topic

Car wont start, possibly IRCM Module? please help

Reply #15 –
Thank you sooo much, I couldn't find those anywhere. Lets see if I can nail the problem now.  If anyone has had the same problem with the car not starting, please enlighten me with what you did to correct it.

Car wont start, possibly IRCM Module? please help

Reply #16 –
Car is still dead, anyone have any clue what could be wrong? I think the car did have an alarm, that was removed, what systems would this affect.  Maybe the neutral safety switch?  I'm going nuts.

Car wont start, possibly IRCM Module? please help

Reply #17 –
Neutral safety switch located on the transmission. If its bad car will not start or stay running (if jumped) I dont have a diagram but I do know it is connected into the ignition. They can be bypassed. If the car had an alarm was it remote start? If it was not removed correctly it will not start.

Car wont start, possibly IRCM Module? please help

Reply #18 –
The neutral safety switch might prevent the car from turning over, but it would not prevent the car from running if you jumped the solenoid to start it.

Since you've got a bunch of systems down, I'd double check those fusible links as Tom suggested. You may have replaced some, but there are a whole bunch, and if you missed the right one you wouldn't solve your problem.

Below you'll see the "Power Distribution" diagram (if it looks funny it's because it's a composite of three scanned pages). Look over this diagram for the functions that are not working in your car to see what circuits they have in common, and trace them back toward the battery to see which fusible link is the problem:
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Car wont start, possibly IRCM Module? please help

Reply #19 –
Ok, thanks for the diagram.  I was going to see if bridging the wires connecting to the neutral safety switch fixed the problem.  Known systems that aren't functioning when i put the key in the ignition are the fuel pump, power windows, dash lights, and there is no clicking sound either.  Headlamps work, power seats work, dome light works.

Car wont start, possibly IRCM Module? please help

Reply #20 –
OK, when you replaced your ignition switch, did you replace the switch or the  lock cylinder? The lock cylinder is the thing you stick the key into. The switch is the thing the lock cylinder activates when you turn the key (bolted to the steering column under the plastic shroud). The switches in these cars are notorious for burning up, and your group of malfunctioning components are consistent with a bad switch. The components you listed as working (power seat, lights, dome light) are not controlled by the ignition switch - they have power all the time.

Also, if you did replace the switch, did you check the connector out? When the switch heats up it often melts the connector, and when you replace the switch the connector doesn't make good contact.
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Car wont start, possibly IRCM Module? please help

Reply #21 –
I replaced the switch, the connector was fine, and the previous owner replaced the cylinder, so that system shouldn't be the problem.  How do you tell if the cylinder went bad?  Because when I put the key in, there is no "clicking" sound as I cycle from off to on to start, etc.

Car wont start, possibly IRCM Module? please help

Reply #22 –
About the only way to tell would be to remove the column shroud and verify that the rod between the ign cyl and switch is actually moving when you turn the key - the rod may simply have fallen out of place.
 
While you've got the shroud off you could use a test light to verify that the ignition switch is putting power out on the correct wires -
 
  • The two solid yellow should have power all the time (if they don't, check your fusible link)
  • Grey/yellow stripe should have power when the switch is in RUN (this is one of the car's ignition circuits)
  • Red/Light Blue stripe and/or brown/white stripe should have power in START (this is the output to the starter solenoid)
  • Red/Light Green AND Brown/Pink should have power in both START and RUN (this powers up certain circuits that need power while the starter is turning)
  • Black/Light Green should have power in RUN and ACC (this is your main accessory circuit)
  • Purple/White or Light green/yellow should be GROUNDED when the switch is in START (this is your "bulb check" circuit)
  • Black/Light Blue should also be GROUNDED in START (another "bulb check" circuit)
2015 Mustang GT Premium - 5.0, 6-speed, Guard Green - too much awesome for one car

1988 5.0 Thunderbird :birdsmily: SOLD SEPT 11 2010: TC front clip/hood ♣ Body & paint completed Oct 2007 ♣ 3.55 TC rear end and front brakes ♣ TC interior ♣ CHE rear control arms (adjustable lowers) ♣ 2001 Bullitt springs ♣ Energy suspension poly busings ♣ Kenne Brown subframe connectors ♣ CWE engine mounts ♣ Thundercat sequential turn signals ♣ Explorer overhead console (temp/compass display) ♣ 2.25" off-road dual exhaust ♣ T-5 transmission swap completed Jan 2009 ♣

Car wont start, possibly IRCM Module? please help

Reply #23 –
:shoothead

Car wont start, possibly IRCM Module? please help

Reply #24 –
yes wiring is a nightmare. i know im a mechanic by trade and i absolutly hate having to trace down eletrical gremlins. but by the sounds of things its very possible that the rod for the switch has moved or isn't alighned right. did you check the wires on the harness there at the switch to see if there burnt or melted? since we know these cars are pr0ne to eletrical fires. i bet if the rod is alright that the wires are melted and causing you to blow your fusable links. and once those go its a pain to find the prob again.
2001 Buick Regal LS (DD):hick:

Got that fox rash again!

-Resident smartass! :ies:

- Don't listen to the naysayers. For every person who actually helps with your project there will be 10 who will discourage you all the while thinking that they are helping. 99% of all people have good intentions. That doesn't make them right.- XR7 Dave - SCCOA.Com