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2nd Gen Ram Tech 1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.

overdrive switch

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  #1  
Old 01-06-2010, 11:52 PM
foxea foxea is offline
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Default overdrive switch

Is there a light that is supposed to come on then you turn off the OD switch? Nothing happens (light) when I turn it off. I changed it with my parts truck and it does the same thing. Also I can not turn the OD back on unless I turn the truck off. Is that normal? It has done this since I bought it.
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  #2  
Old 01-07-2010, 12:14 AM
91xjgawes 91xjgawes is offline
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You should not have to turn the truck off...you should be able to put it in, and take it out of OD by just using the button.
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Old 01-07-2010, 12:15 AM
91xjgawes 91xjgawes is offline
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and im not 100% but i think there is a light, but i have not taken mine out of OD in so long i forget...
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  #4  
Old 01-07-2010, 12:52 AM
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barracudadave67 barracudadave67 is offline
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The O.D. light will come on when you push the button. When you push the button, the light should come on, and the tranny "Should Not" go into overdrive. May be your bulb is burnt out. On a 94 I think the button is on the dash, and if I remember right, Your button should have the light in it. Later mods the button is in the end of the colum shift lever, and is called "Cruise_Haul", on the dash.

The tranny automatically resets to O.D. whem the Ig sw is turned off.

IN other words pushing the button should keep the tranny from going into O.D., and the light should be on.

Hope this helps.

barracudadave67 aka Dave C.
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  #5  
Old 01-07-2010, 01:05 AM
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It's VERY common to have the OD switch bulb burn out...
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Old 01-07-2010, 08:37 AM
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Should push the button and light up and stops OD from working then push it again and light goes out and OD works again. And yes every time you turn the truck off it resets it.
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Old 01-07-2010, 11:00 AM
foxea foxea is offline
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OK, I will check the light, but what could be wrong that the only way it turns the OD back on is to turn the truck off? Another quick question, since I have two switches, can I wire the other one up to be a on/off switch for fog lights? Will it work like that?
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Old 01-09-2010, 04:39 PM
foxea foxea is offline
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Quote:
Originally Posted by foxea View Post
OK, I will check the light, but what could be wrong that the only way it turns the OD back on is to turn the truck off? Another quick question, since I have two switches, can I wire the other one up to be a on/off switch for fog lights? Will it work like that?

Can anyone help me on this one.
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  #9  
Old 01-12-2010, 05:54 PM
foxea foxea is offline
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I took apart the switch and the bulb is not burned out. Everything looked fine. What else do I need to take a look at? I see how it works so it looks like I can not use it for a fog light switch. Inside the switch, when you push the switch in it makes contact with two metal pieces and shorts them. When released the contacts are no longer touching the button. To turn it off the same process is done. The same two contact are shorted. With that being said is there a relay somewhere that turn the OD on and off since the contacts are not constident shorted when it is off or on. If that make since.
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Old 01-12-2010, 08:22 PM
zje400ex zje400ex is offline
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Hmm. My overdrive switch just stopped working too. Mine is located above the radio and it used to light up when i pushed it in and now it doesnt. I'd like to see what you figure out. I havent messed with mine yet
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  #11  
Old 01-14-2010, 08:15 PM
foxea foxea is offline
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i finally found a solution on another forum. I am copying and pasting them here if anyone else has the same problem. They were posted my JMW132001. Not taking any credit on this one.



An overdrive off indicator is standard equipment
on all instrument clusters. However, on vehicles not
equipped with the optional overdrive automatic
transmission, this indicator is electronically disabled.
The overdrive off indicator is located near the lower
edge of the instrument cluster overlay, to the right of
center. The overdrive off indicator consists of a stencilled
cutout of the words “O/D OFF” in the opaque
layer of the instrument cluster overlay. The dark
outer layer of the overlay prevents the indicator from
being clearly visible when it is not illuminated. An
amber lens behind the cutout in the opaque layer of
the overlay causes the “O/D OFF” text to appear in
amber through the translucent outer layer of the
overlay when the indicator is illuminated from
behind by a Light Emitting Diode (LED) soldered
onto the instrument cluster electronic circuit board.
The overdrive off indicator is serviced as a unit with
the instrument cluster.
OPERATION
The overdrive off indicator gives an indication to
the vehicle operator when the Off position of the
overdrive off switch has been selected, disabling the
electronically controlled overdrive feature of the automatic
transmission. This indicator is controlled by a
transistor on the instrument cluster circuit board
based upon the cluster programming and electronic
messages received by the cluster from the Powertrain
Control Module (PCM) over the Chrysler Collision
Detection (CCD) data bus. The overdrive off indicator
Light Emitting Diode (LED) receives battery current
on the instrument cluster electronic circuit board
through the fused ignition switch output (st-run) circuit
whenever the ignition switch is in the On or
Start positions; therefore, the LED will always be off
when the ignition switch is in any position except On
or Start. The LED only illuminates when it is provided
a path to ground by the instrument cluster
transistor. The instrument cluster will turn on the
overdrive off indicator for the following reasons:
˛ Bulb Test - Each time the ignition switch is
turned to the On position the overdrive off indicator
is illuminated for about two seconds as a bulb test.
˛ Overdrive Off Lamp-On Message - Each time
the cluster receives an overdrive off lamp-on message
from the PCM indicating that the Off position of the
overdrive off switch has been selected, the overdrive
off indicator will be illuminated. The indicator
remains illuminated until the cluster receives an
overdrive off lamp-off message from the PCM, or
until the ignition switch is turned to the Off position,
whichever occurs first.
˛ Actuator Test - Each time the cluster is put
through the actuator test, the indicator will be
turned on during the bulb check portion of the test to
confirm the functionality of the LED and the cluster
control circuitry.
The PCM continually monitors the overdrive off
switch to determine the proper outputs to the automatic
transmission, then sends the proper messages
to the instrument cluster. For further diagnosis of
the overdrive off indicator or the instrument cluster
circuitry that controls the LED, (Refer to 8 - ELECTRICAL/
INSTRUMENT CLUSTER - DIAGNOSIS
AND TESTING). For proper diagnosis of the overdrive
control system, the PCM, the CCD data bus, or
the message inputs to the instrument cluster that
control the overdrive off indicator, a DRBIIIt scan
tool is required. Refer to the appropriate diagnostic
information.



This is from the factory service manual. Maybe this will help you out a little more.
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OK, so now we are getting somewhere. Now in English, from what I am understanding from the above post, and with out testing it with a scanner, it looks like there is 4 posabilities. The switch, PCM, the speed sensor in the transmission, or a broken wire. So I have ruled out he switch (one down), I have a different PCM from my parts truck so I may switch that and see if that does anything, I will have to look to see if they are the same part number I have a 94 truck and this is a 95 parts truck, both 5.2. I already sold the speed sensor from the parts truck, oops. I will also look at the wiring under the transmission. I am assuming if there is a broken wire, that would be the place to start looking.

Eric

Not a problem. I am thinking the same as you as i have read through all of it and come up with the same possibilities.
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  #12  
Old 01-14-2010, 08:18 PM
foxea foxea is offline
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There was a diagram too, but i can on figure out how to copy it and past it here.

Last edited by foxea; 01-14-2010 at 08:21 PM..
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  #13  
Old 06-01-2011, 12:36 PM
tamika3532 tamika3532 is offline
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im trying to get my overdrive switch on my 05 stratus checd out but i dnt know where it is located does anyone know?
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Old 06-01-2011, 12:36 PM
 
 
 
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