new guy here need some help please
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new guy here need some help please
hey guys i just picked up a 96 2.5 5spd 2wd and it has an electric fan wired to a switch is there anyway to wire it to the thermostat so it only comes on when the truck gets hot i searched for it but came up with nothing, my speedo also doesnt work but the odometer does i saw something about both not working but nothing about just the speedo, and theres a wierd squeaking noise coming from somewhere in the back any input would be greatly appreciated thanks in advance.
Champion
Joined: Dec 2003
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From: Sycamore, Illinois (displaced to Arkansas)
Here is what the service manuals states about the radiator fan:
Under stock, unmodified, wiring conditions, I would say it most likely sounds like the engine coolant temperature sensor was bad.
You can download the service manuals via a link on this page: https://dodgeforum.com/forum/1st-gen...ce-manual.html
In it, it had tons of information, including wiring diagrams. Look on page 7-20 (page 243 of the 1507 page document) for how to test the cooling fan.
As far as the speedometer/odometer, they both work off the exact same wire coming into the instrument cluster (it's electrical, not cable driven), so it sounds like you have a bad gauge.
COOLING SYSTEM FAN—2.5L ENGINE
Models equipped with 2.5L engine have an electrical cooling fan (Fig. 5). The fan is electrically controlled by the powertrain control module (PCM) through the fan control relay. This relay is located in the power distribution center (PDC) (Fig. 6). For the location of the relay within the PDC, refer to label on PDC cover.
The PCM regulates fan operation based on input from the engine coolant temperature sensor and vehicle speed.
The fan is not energized during engine cranking regardless of the electrical input from the engine coolant temperature sensor. However, if engine operating conditions warrant fan engagement, the fan will run once engine starts.
The fan is energized whenever the engine is running and the air conditioning compressor clutch is engaged.
When the air conditioning compressor clutch is disengaged, the fan operates at vehicle speeds above 40 mph. This is done if engine coolant temperature is above 110°C (230°F). The same is true for vehicles that are not equipped with air conditioning. The fan will turn off when coolant temperature drops to 104°C (220°F). At speeds below 40 mph, the fan turns on when coolant temperature reaches 99°C (210°F) and turns off when coolant temperature drops to 93°C (200°F).
Models equipped with 2.5L engine have an electrical cooling fan (Fig. 5). The fan is electrically controlled by the powertrain control module (PCM) through the fan control relay. This relay is located in the power distribution center (PDC) (Fig. 6). For the location of the relay within the PDC, refer to label on PDC cover.
The PCM regulates fan operation based on input from the engine coolant temperature sensor and vehicle speed.
The fan is not energized during engine cranking regardless of the electrical input from the engine coolant temperature sensor. However, if engine operating conditions warrant fan engagement, the fan will run once engine starts.
The fan is energized whenever the engine is running and the air conditioning compressor clutch is engaged.
When the air conditioning compressor clutch is disengaged, the fan operates at vehicle speeds above 40 mph. This is done if engine coolant temperature is above 110°C (230°F). The same is true for vehicles that are not equipped with air conditioning. The fan will turn off when coolant temperature drops to 104°C (220°F). At speeds below 40 mph, the fan turns on when coolant temperature reaches 99°C (210°F) and turns off when coolant temperature drops to 93°C (200°F).
You can download the service manuals via a link on this page: https://dodgeforum.com/forum/1st-gen...ce-manual.html
In it, it had tons of information, including wiring diagrams. Look on page 7-20 (page 243 of the 1507 page document) for how to test the cooling fan.
As far as the speedometer/odometer, they both work off the exact same wire coming into the instrument cluster (it's electrical, not cable driven), so it sounds like you have a bad gauge.
some auto stores sell an aftermarket thermostatic fan control with a temp thing that sticks right into the radiator. I had one on my daytona for a while, it was really handy. they are around 20$ at advance auto parts. the squeaking out of the back might be the center bearing(i think thats the name) on the driveshaft(if you have the 3 piece driveshaft). they start to squeak after a while. and for the speedo? could be a bad gear/wire causing just the one to not work although i never heard of that before...hmm
Haynes has a fan controller that works between 32 and 240 degrees. The thermal sensor gets wedged in the radiator. You can either use that or fix the problem. But if you do go after market. I would suggest wiring it to a switch so you can turn it off on hot days. Otherwise you'll find your battery dead all the time.
they usually have a wire run to an ignition wire so the fan doesn't run when the vehicle is off...ltheir pretty handy if you know something about vehiclular wiring...
Very true. But you know as well as I do that Dakota's didn't come with the most reliable wiring. LOL
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thanks for the help guys the fan was suppose to be there and i found the wire that hooks to it the guy i bought the truck from was just to dumb to do it i guess lol. the odometer is not working i thought it was because the trip odometer is does that help what it could be any? where is the center bearing at? i wouldnt think it would have a three piece its a short be reg cab. could i just convert it to a manual speedo and just get an aftermarket speedo? not to get off topic but my gas gauge goes crazy i heard its because of tabs on the fuel pump assembly do they make an aftermarket sending unit that i could wire to an aftermarket gauge?
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Too many problems to list on the fuel gauge and pump on these trucks. You can replace the in-tank pump only to find a wiring problem, or four. Your best bet is to get used to a funky gauge and start figuring your fuel consumption and mpg by using/resetting the triip odometer every time you gas up. Fill the tank, reset the odometer and calculate your mpg next time you fill up. Then use the odometer to tell you when to get gas...if your low-fuel light is dead.
since you have a short bed reg cab you most likely dont have the center bearing but just look at the driveshaft. if you dont have one then it could be your brakes, mine do that too. and an fyi that center bearing on the driveshaft is kind of a b**ch to replace