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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#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.

#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.

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.