Question about 1996 Dodge Caravan
My 1996 Plymouth Voyager instrument cluster sometimes does not work. the speedometer, fuel gage, temp gage, odometer, and all indicating & warning lights are inoperative. Occasionally a a tap on th dash above the cluster will restore it to operation; other times I wait a day or two and it's back at start up.
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Posted on Jan 02, 2017
I will take a stab at this.
Have you checked to make sure that the fan switch is not bad?
Are you stating that the fan works normally, but when your engine gets hot the fan stops?
I would do what I have always done in this situation. Find a hot wire under the hood that is hot when the key is switched on. Run the fan to that wire. Then when the car is on, the fan will work. An electric fan is a pain in the but. They do this a lot. You can buy a new fan motor switch or take my way that I always solve this problem.
I can't remember if that is front wheel drive or not. If there is any way to take the fan off and replace it with a flex fan, you can do that. This will never stop working unless your engine stops working. This works great if you have a rear wheel drive car. I do not know what that car is.
Have you checked your thermostat? This could be a sensor going bad. Either way, I would change the thermostat, because if you have never changed it, you will be better of knowing that the thermostat is new.
I do not know if you liked my answer or not. but I explained what I do for this problem. My father was a mechanic for 40 years before his death and I worked in the garage from 8 years up til his death. I do all of my mechanic work if at all possible within my limits. I know for a fact that this way will not let you down unless the fan decides not to work one day. I have not seen that happen yet.
I hope that this fixes your problem. Rate this as a fix if you are happy with the answer. If you have more concern or questions, feel free to ask me more. I am here to help any way that I can.
Posted on Jun 17, 2008
SOURCE: INSTRUMENT CLUSTER
The red electrial connector on the main circuit board (of instrument cluster panel) has one and/or several soldered pins that have broken away or become loose at the soldered area. The soldered connections may look o.k., however, under a magnifying glass you can see a circular crack all around the protruding soldered pin. Fire up the soldering iron- use a fine point, add a tad of new rosin core solder and fix the crack. There may be trouble codes associated with this condition: P1695 and/or P1698; when you go to pull the Instument cluster out of the dash, jiggle to wire connector at the back of the IC with key 'on', and look at the odometer; if it flashes on/off, this is most likely the problem
Posted on Nov 11, 2008
SOURCE: Intermittant instrument cluster
The body controller (BCM) must send a message to the engine controller (PCM) to tell the PCM that it's OK to start and run when a theft system is involved. As long as the OK-to-run signal can make it to the PCM, all will be well.
But during the times when the gauges are flat, the bus communication system is probably crashed and there's no way to deliver the message. The PCM has no recourse but to disallow fuel at that point, killing the engine. The only thing that doesn't fit is that the starter isn't taken away at some point, but it may be something that doesn't happen in every model year. The solution is with the communication bus, the CCD. It operates on two circuits, 2.5 volts each and connects to every module on the van that needs to share information. The instrument cluster printed circuit board is actually much more than just a board, it's a processor in its own rite. It controls gauges, telltale bulb illumination and supports the CCD bus both through voltage regulation and supplies the point of circuit termination (ground). The termination seems to be the key. Without ground, the bus voltage is pushed far above its normal 2.3 to 2.5 volt range, into the 7-volt area. Bus communication depends upon a voltage matrix very close to 2.5 volts, so this effectively crashes the network. Everything becomes a zero. One very good diagnostic tool for when the system crashes is to apply a firm, open-palm slap to the dash just above the instrument cluster. Works almost every time. While the problem can be temperature related (parked in sun), a good jolt usually brings it back online and allows the van to start and run. It seems ham fisted but it's almost impossible to diagnose by disassembly. The act of touching the area around the cluster normally brings it back and you're faced with the question of whether it was coincidence or not. I prefer the slap. Testing the data link connector (DLC), the trapezoid-shaped connector under the left dash area, will tell you if the bus is crashed or not. The third terminal from the left on each row (8 apiece) is CCD bus. Remember that 2.3 to 2.5 volts is normal while the key is on and the bus is active. You should see the voltage dancing, varying rapidly in response to data transmission if tested with a digital voltmeter. Anything above this is likely to be FAR above, indicating a slap is at hand... you know what I mean. The board isn't cheap... close to $450 and it requires a calibration before the tach or speedometer will operate. This may involve a trip to the dealer; I'm not sure if aftermarket scan tools can accomplish this task. Labor to install a board can also vary according to your repair facility.
Posted on Dec 04, 2008
SOURCE: Intermittant instrument cluster
HIT THE DASH! The instrument clusters (gauges) have bad soldering joints. You can hit the dash above the cluster to jar it to connect. A hard hit. Many have this problem, and you are better off taking your instrument cluster out and soldering the connector pins on the back then purchasing a new one or taking from the junkyard. They are all the same, and fail with time if left unsoldered.
Posted on Apr 28, 2009
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