Please help. Ive got a 94 4x4 mm 3.0 5 sp. truck. What is the box where i mentioned in subject line. Mine has a plug not connected just sitting beside plug in port. Also blend for heat/ac settings was not working according to previous owner. Everything else seems to be working. Id bet you know this answerand what this mysterious electronic box is and what it does. ECU? Thanks for your time. Cchuckster11
20200702_160735.jpg
Last edited by SubGothius; 07-05-2020 at 12:27 PM.
Post up a picture of it.
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Hmm, mystery box... the heater should be easy to fix though. Look at the cable routing and see if any retainer clips are missing on the sides of the heater case. They either go missing or are loose and don't grip the cable sleeves. There will be marks where the clips have held the cable sleeves so you won't have to guess what location to secure them for correct function.
Thank you sir for the heater blend controls education. How many am i looking for pkease. I can see one on drivers side. I appreciate your help.
Last edited by Cchuckster11; 07-02-2020 at 05:29 PM.
The mystery box seems to be an after-market device. Is it connected with that wire that goes toward the shifter? I'm fairly confident it is not the ECU.
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Pretty sure its a stock electronic something, and its unplugged so somebody knows what it is. Thanks for the input. Many pins on unplugged plug. Truck only has 41 k miles and basically a one owner bought by a Mitsubishi truck dealer for lot plowing and the occasional errand.
ECU is a metal box. If the truck runs with it disconnected then it's an after market alarm. Alarms are plastic.
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Aha! I betcha that's the electric controls for the snow plow.
http://www.mightyram50.net/vbulletin...ll=1#post33433
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Snow plow works fine. This is a metal box, and the plug is unplugged on drivers side but everything works as far as i know. Ive been driving it for a few months without much of any issues. 41K miles and it runs like a top. Id bet this is a factory part but dont know what it is and why its unplugged. Only the heater/ac blend controls wont switch to the different positions. Another member said that is probably a linkage rod issue. Check engine light comes on sometimes for a but always turns off again very quickly. Anyone else have the answer? This is an interesting situation friends. I know somone knows what this box is. Big factory multi pin plug on drivers side is unplugged from what looks like factory wiring harness, but almost everything works fine. Have a great holiday weekend. Ill check back later tomorrow for the next contestants answers.
Last edited by Cchuckster11; 07-02-2020 at 08:53 PM.
Its a metal box and really looks factory. Ill look closer to both sides looking for numbers, more plugs ,etc. Thanks Boss.
Plug it in and see what happens
I know, im thinkin about plugging it in to see what happens. Ill kerp ya posted. Did i mention i have the window sticker from when it was built? Might say something on there i guess but i didnt notice anything out of the ordinary. Best to ya.
looks like a cheap alarm like i pulled out of mine, plug is the same
At a guess I'd say the alarm will go off. A PO probably lost the key fob to turn it on and off so they unplugged it since those things cost a lot to replace.
I don't know how the heater control cables are routed in a US left hand drive truckIt will be only one cable that has come adrift though. The other cable will be for the heater valve/tap.
Thanks....that will help sir.
On my gen one the heater valve is on the left side the air duct controls are all on the right side.Originally Posted by geezer101
I don't know how the heater control cables are routed in a US left hand drive truck
Last edited by 85Ram50; 07-03-2020 at 02:15 PM.
^same as mine. But that's a Gen 1. I haven't picked apart a Gen 2 to know cable routes.
OK, well i pulled a lower dash trim panel(2 screws), and plugged in the unplugged male, no alarm, no change of anything, drove 20 miles zero change. Wil post a better couple pics, as best as i san read the part # on electronic box is MB822088. There is another much smaller box directly in front of the big one also looks factory made. Film at 11: 00. Let me know peeps. Have a great 4th of July weekend folks.
The MB# is indicative of it being a factory OEM part. Our generations of trucks didn't come with a factory immobiliser/alarm. I am thinking - auto trans ECM...? It's the only other ECM that would've been fitted to a Gen 2 truck with injection. What is on the compliance/build plate in the engine bay? The trans code will tell us if it has had a full drivetrain swap at some point in it's life.
This truck is all original 41k miles pretty much one previous owner. Runs and drives like a top.
Central locking unit
What? Central locking unit? Sounds pretty great. I have the build sheet from window when it was new. I will send out a pic of that and of the smaller metal electronic box in froht of this bigger one. Also the build plate on firewall. Thanks
Yeah, central locking unit sounded like some locking differential option. But, nonetheless, not what this box is. Still hoping for a correct answer talked to po. He said he saw it disconected snd e erything worked except the heater/ac station selector so he didnt plug it in. AC works perfect. I plugged it in and no change i could tell. Has what loojs like a 18 pin coupler without counting.ALOT of small wires into factory harnes. No tow package eithr and its a mb part number so came with the truck.
^really? I didn't know it was a factory option
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