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Chrysler 300M TSB #070100

8 messages,  Last post on Aug 23, 2009 at 3:50 AM

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What is this discussion about? Chrysler 300M, Engine, Sedan

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#4 of 8 Cruise Control Problems Chrysler 300M by herbied2 Dec 20, 2007 (7:08 pm)
I have a problem which has surfaced on my 1999 Chrysler 300M after about 125K miles. With no warning, the cruise control will disengage. On other occasions it will not activate when I hit the set button, or in some circumstances will be working fine, but when I must disengage because of traffic and attempt to resume, it will not work.   The mechanics at my dealership are guessing, throwing parts and labor at it, when it is clear that they really do not know what the problem is. So far I have had a new servo installed and a new wheel speed sensor. While the parts and labor have totaled over $300, the problem has not been fixed.   Has anyone out there had a similar problem and had it successfully repaired? If so, what turned out to be the real problem?   Thanks Replies to this message: martypyeatt (Jun 05, 2009 1:47 pm) martypyeatt (Aug 01, 2009 12:58 pm) iherbivore (Aug 23, 2009 3:50 am)
#5 of 8 Re: Cruise Control Problems Chrysler 300M [herbied2] by martypyeatt Jun 05, 2009 (1:47 pm)
Replying to: herbied2 (Dec 20, 2007 7:08 pm) I also have a 1999 Chrysler 300M the cruise control will not engage after I hit the cruise on tab then set. Some times the cruise light will just go out and the only way to reset it so the light will come back on is to pull over shut the car off, then after restarting the car I can some times get the cruise to work. I also have the disengage because of traffic and attempt to resume, it will not work, If you here of anything to fix your problem Please let me know. Replies to this message: martypyeatt (Aug 01, 2009 12:58 pm) iherbivore (Aug 23, 2009 3:50 am)
#6 of 8 running hot by keikat Aug 01, 2009 (12:23 pm)
we have had themostate radiat replaced still runs hot any suggestions
#7 of 8 Re: Cruise Control Problems Chrysler 300M [martypyeatt] by martypyeatt Aug 01, 2009 (12:58 pm)
Replying to: martypyeatt (Jun 05, 2009 1:47 pm) I replaced the brake switch at the brake pedal and that fixed the cruise control problem. It cost $20.00 at a Chrysler Dealer that was still in business. Replies to this message: iherbivore (Aug 23, 2009 3:50 am)
#8 of 8 Re: Cruise Control Problems Chrysler 300M [martypyeatt] by iherbivore Aug 23, 2009 (3:50 am)
Replying to: martypyeatt (Aug 01, 2009 12:58 pm) I can confirm this. Condition existed on my vehicle. I inspected. Found that the brake switch is comprised of three separate switches. One of the switches is normally closed when the brake pedal is released. An ohmmeter on this switch showed a resistance of 1-2 ohms when closed. Removing the large cover over the electrical connectors gave access to the actual contacts for the switches, at which point I found a considerable amount of material transfer between the two posts of the troubled switch. Gently filing the posts restored a 0 ohm connection when switch is closed, and cruise control now works again. I am uncertain how long this repair will last, but the simplicity of the repair makes it worth an attempt to save $20.   edit: If you try this repair there is one thing to note: When putting the switch back together, the plunger must be held about half way in. Take a look at it, you'll see why.

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