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DoHio

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Discussion starter · #1 ·
I have a question for someone in the know, or who has a FSM handy.

On my way to work this morning I hit the freeway and try to set the cruise. It didn't come on. The light in the dash didn't come on. I have no cruise.

Now, I assume since I use it all of the time it has to be a fuse or relay. I come in to the office with the owner's manual?no fuse block or power block layout in the manual.

When I took the manual to the D I looked at the side panel fuse layout?I don't see a cruise control fuse?popped the hood and the layout for the power distribution center doesn't show anything for the cruise control? granted I did a quick scan of the layouts because I'm working and have people in the office?so it's possible I missed in my 'scan'

My question is this?is there a fuse or relay specific to the cruise control? Anyone else have this happen?what was your fix? Anyone with an '01 FSM handy have some insight on where to find the simple solution (ie fuse or relay) it has to be a simple something?

Thanks
 
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#2 ·
Hey

Craig there's another fuse box up under the dash the secret one.
I'm at work and don't have my FSM in this puter. Make sure you ask me later about it as I have it on Disc that way I can Make you a copy :cheesy:
Check for the obvious in the hidden box I'll look it up later today
Steve
DOC Pres
 
#3 ·
I've had issues with ours, I would press the steering wheel on button, sometimes it wouldn't turn on, but persitence eventually turns it on and it works, I'm wondering if the contacts get dirty over time.
 
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Discussion starter · #4 ·
Lunchtime update

I had to go home for lunch today so the big boy (read?dog) could get out of his crate (wife is gone all day.) I hit the freeway and lo and behold the cruise is now working.

My concern is that it was raining pretty good this morning?I'm hoping something didn't get wet?Intermittant electrical problems can be such a pain?for now all is working.

Of course while I was home I forgot to get into the FSM to locate the 'secret' fuseblock. I'll later today though.

Thanks for the replies so far?any other ideas? don't hesitate to throw them out.
 
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#5 ·
Could have just been a computer glitch.
Had it happen to the Ram when we were out in Utah - headed for Bryce Canyon. Cruise wouldn't engage. I pulled over, shut down, restarted, and voilá - it was working. Haven't had a problem since.
Kinda like having to reboot your home computer once in a while 'cuz something stopped working.
Hope that's all it was Craig.

Joe
 
#7 ·
I've known the switches to go bad on occaision, but hardly ever do I see a failure with anything more serious than that. Chrysler cruise controls are some of the most trouble-free out there.

Talking about computer "glitches"?My mom's '96 Cherokee would once in a while have a cruise problem where the system wouldn't power up. Turn it off, and restart it, and everything worked fine again. Never did get to the bottom of that, and my mom never uses the cruise, so it's a non-issue for her.
 
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Discussion starter · #9 ·
Here's the latest in the cruise control saga.

It initially stopped working on the way to work?a rainy day. later that day (no more rain) the cruise worked again.

Next day coming to work (more rainy than the day before)?no cruise. At lunchtime it worked again. Going home that night (wet) it didn't work.

Yesterday I did the ignition sequence to see if there was a code?yes there's a code?P1596 a high current situation.

last night I peruse the FSM and see that the cruise runs through the PCM. It appears I might need DRB help in determining the reason for the high current level?I couldn't find in the FSM any way to isolate any possible causes. I'll check the PCM connections and maybe get dielectric grease on them. Maybe it's just simply too much water getting in and the D is aging?perhaps a new 'grease barrier' is warranted?it certainly won't hurt.

There you go?anyone have any other ideas?DRB experience?etc.
 
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#10 ·
I don't have access to any FSM diagnostic volumes from here, but googling around that code comes back as "speed control switch always high"? it's a voltage, not current, situation?

Sounds like an open circuit somewhere? connector, clockspring?

The switch basically connects the sense line to ground through various resistors (different ones for each switch)? with a fixed resistor that always pulls the line down a little so the PCM can tell that the circuit isn't open.

from the '03 fsm:
Multiplexing
The PCM sends out 5 volts through a fixed resistor
and monitors the voltage change between the fixed
resistor and the switches. If none of the switches are
depressed, the PCM will measure 5 volts at the sensor
point (open circuit.) If a switch with no resistor is
closed, the PCM will measure 0 volts (grounded circuit).
Now, if a resistor is added to a switch, then the
PCM will measure some voltage proportional to the
size of the resistor. By adding a different resistor to
each switch, the PCM will see a different voltage
depending on which switch is pushed.
Another resistor has been added to the ?at rest circuit?
causing the PCM to never see 5 volts. This was
done for diagnostic purposes. If the switch circuit
should open (bad connection), then the PCM will see
the 5 volts and know the circuit is bad. The PCM will
then set an open circuit fault.
 
#11 ·
tomk said:
from the '03 fsm:
Multiplexing
The PCM sends out 5 volts through a fixed resistor
and monitors the voltage change between the fixed
resistor and the switches. If none of the switches are
depressed, the PCM will measure 5 volts at the sensor
point (open circuit.) If a switch with no resistor is
closed, the PCM will measure 0 volts (grounded circuit).
Now, if a resistor is added to a switch, then the
PCM will measure some voltage proportional to the
size of the resistor. By adding a different resistor to
each switch, the PCM will see a different voltage
depending on which switch is pushed.
Another resistor has been added to the ?at rest circuit?
causing the PCM to never see 5 volts. This was
done for diagnostic purposes. If the switch circuit
should open (bad connection), then the PCM will see
the 5 volts and know the circuit is bad. The PCM will
then set an open circuit fault.
Click to expand...
Uhmmmm?OK :?
Anyway. I have this happening frequently since about 1999. On mine it seems to help if I turn the steering whell lock to lock (not while I'm driving); therefor I assume it may be somewhere in the steering wheel contacts. Took it to the stealership and got the standard answer "can't re-produce the problem" so I have just been dealing with it.

Helmut
 
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#12 ·
The two cruise switch wires (sense and ground) come through the clockspring in the steering column (along with the airbag and horn wires)?
 
Discussion starter · #14 ·
Seems to me that if it were the clock spring don't people report other symptoms or failures? Everything wheel related is working normally?radio controls are fine?

I have looked at the FSM and I'm wondering if the actual cruise switch is what has gone bad?I will investigate there

I also need to get under the dash to the secret fuse block?for those who have found it?is it on the front side of the junction block? It appears that way I think in the FSM?

Thanks
 
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#15 ·
Since there are a number of wires that can go through the clockspring, any function could be affected. In my case the airbag light came on but the cruise control worked.

The hidden fuse panel is on the left side of the dash behind the external fuse panel accessible from underneath the dash.
 
#16 ·
Yes, switches do fail sometimes. You have to check the whole circuit before you just jump on one item. Unless the characteristics of the fault behavior have always shown themselves in a certain manner. Then you tend to shortcut the procedure.

Kinda like in the early Ford vehicles, when a custormer complained of a powersteering fluid leak, you always just ordered a high-pressure steering hose for the vehicle as that was always the problem. You didn't even have to look to be sure. Or a Pontiac of the same time frame, when the customer calls and says that his v-8 car cranks but won't start, and it had about 45k on the engine, you had it towed and ordered a timing chain set, as it had jumed a tooth or two when he shut it off the night before. Guaranteed.
 
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Discussion starter · #17 ·
Well, it has to be the clock spring. On the way home tonight my steering wheel radio controls stopped working?When I arrived home while sitting in the driveway I turned the wheel lock to lock twice and the radio controls started working again?

Has anyone ever ordered from Wholesale Mopar they have the part for $45. I haven't yet checked locally.
 
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Discussion starter · #18 ·
Clockspring?The Update.

This started with intermittant cruise control issues. Then CC stopped, next the radio steering wheel controls started acting up?then stopped. Finally on monday the horn wouldn't work and the airbag light in the dash came on. I figured it was time.

Local part was $60.10?I bought it yesterday at lunchtime and installed it last night. Took me about an hour and a half start to finish and I think I could do it again in under an hour. Not a hard job at all. Some of that time was running to the part store for a different steering wheel puller, mine (old tool) wasn't wide enough for the holes in the D's steering wheel.

All is functioning normally again.

Just for the fun of it I called 2 local dealerships to see what the charge would have been for them to install the clockspring. I like to know what kind of money I save by doing things myself. I had 2 estimates?one for $172 plus tax and the other was $225 plus tax. I love having the FSM?
 
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#19 ·
With the $$$ you saved you should come to The Smokies so we all talk about your Clock spring! :cheesy:
Steve'
DOC Pres
 
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