electric seat motors found
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Rookie
Joined: Feb 2007
Posts: 51
Likes: 0
From: Queensland, Australia
electric seat motors found
Hi all I have been doing allot of buying for my 95 RAM of late and have finally found new electris motors for the powered seats in our machines. I have included the link to the site for anyone who is looking to buy them.
https://ssl.perfora.net/2men1garage....aram=cid%3D%26
Hope this is helpful to some people.
https://ssl.perfora.net/2men1garage....aram=cid%3D%26
Hope this is helpful to some people.
Yeah appreciate the info. I was gonna start looking at the junkyard for the rear motor in my seat. It's not working but haven't had a chance to troubleshoot whether it's the switch or motor. Pricing looks decent on those so if I need one I
know where to look.
know where to look.
Legend
Joined: May 2005
Posts: 8,663
Likes: 8
From: Central Oklahoma
Maybe I'm weird (yep) but try troubleshooting and repairing what you have. It's worth a shot and could be a cheap fix.
Hell yeah I'm weird like that too! I'm a cheap/poor SOB so I ALWAYS try to troubleshoot and repair before spending what little cash I have on new parts. I was just saying that if the motor WAS shot and I couldn't find one at the JY then the prices weren't too bad. But definitely agree with ya there dude, gonna try to troubleshoot , just haven't had the chance. All the other motors work just fine so could just be a wire, etc.
Rookie
Joined: Dec 2005
Posts: 53
Likes: 0
Hold on before you buy any new motors, I just fixed two of the 3 of the ones in my '98 yesterday with nothing but a soldering iron. The front-back one worked, but the other two didn't. One would turn real slow a few turns, and eventually just stop. The other nothing at all. If you like tinkering with this stuff and are comfortable with electro/mechanical stuff, this isn't two bad.
Before you take the motors out, disconnect the harness from them and place an ohm meter across the terminals (a pair of clip leads will help, they are hard to get to) and read the resistance. My dead motors read about 40 ohms. After I "fixed" fixed them, they read about 1.5 ohms. If you read a low value, this fix may not be for you.
First you might think that you can't even get them out. The torx head screws holding them to the frame look to be blocked by the jack screw (threaded rod). I found that using a bit on a flexible bendy extension I was able to get them out.
On the one closest to the door, take the rear most bolt out first (the short one, the other is actually a pivot pin) then swivel the bracket down a bit and you will be able to get the socket on the other one. Once you get both bolts out, swivel the whole thing down and out toward the front so it is pointing almost the the brake pedal, and then you can slip it out of the end of the jack screw. (this will make sense when you are doing it).
Take the motor off the gear box (two more small torx head screws), then take the long screws out of the motor (1/4" heads), and take the end caps and housing off.
The problem is a component in the end cap where the brushes are. Its not the capacitor (green in my motors) but something I spent a long time looking for. I'm an engineer and I couldn't figure out for the longest time what was up, until I ohmed out the motor at 40 ohms, but got 1.5 ohms reading right at the brushes in the cap when they were both squarely on a single commutator.
Where you see the brass contact come inside the cap, it appears to take a brass bus bar over to the brush, but that bus bar is actually a wafer type device of some type. Look close, it is not a sold bar, but two plates of brass with something thin between them. I still have no idea what they are/do.
And on my motors it was presenting most of that 40 ohms. My fix? I scraped the top edge of both plates with a screwdriver and deposited some solder across the edge of the two plates, effectively shorting them out. I applied power to test and the motor sang!
All I can figure is it is some kind of current limiting device, or circuit breaker, or something the designer put in there and would deteriorate over time, thereby improving the replacement motor market.
Putting the armature back into the end cap with the brushes can be a bit tricky. Slip into the bushing against the brushes, then keeping a bit of pressure on it, use a jewlers screwdriver, or dental pick and pull one brush back until it clears the commutator. Lean the armature to that side with a little bit of pressure, and the brush should stay in place. Then pull back the other brush and the armature should slip down in the cap all the way.
The other tip is when you are slipping the motor casing back over the armature, keep a finger on the far end of the armature and one on the brush end cap. If you don't, as you slip the casing down on the armature, the magnets can grab the armature and pull it out of the cap and brushes and you get to start all over again.
Lastly, I think the back end of the motors have an open, hex/allen bore in them that you could use to turn the motor and mech while it was all still installed if you have to.
Hope that helps, I for one am glad I didn't drop $150 for new motors on my truck!
Before you take the motors out, disconnect the harness from them and place an ohm meter across the terminals (a pair of clip leads will help, they are hard to get to) and read the resistance. My dead motors read about 40 ohms. After I "fixed" fixed them, they read about 1.5 ohms. If you read a low value, this fix may not be for you.
First you might think that you can't even get them out. The torx head screws holding them to the frame look to be blocked by the jack screw (threaded rod). I found that using a bit on a flexible bendy extension I was able to get them out.
On the one closest to the door, take the rear most bolt out first (the short one, the other is actually a pivot pin) then swivel the bracket down a bit and you will be able to get the socket on the other one. Once you get both bolts out, swivel the whole thing down and out toward the front so it is pointing almost the the brake pedal, and then you can slip it out of the end of the jack screw. (this will make sense when you are doing it).
Take the motor off the gear box (two more small torx head screws), then take the long screws out of the motor (1/4" heads), and take the end caps and housing off.
The problem is a component in the end cap where the brushes are. Its not the capacitor (green in my motors) but something I spent a long time looking for. I'm an engineer and I couldn't figure out for the longest time what was up, until I ohmed out the motor at 40 ohms, but got 1.5 ohms reading right at the brushes in the cap when they were both squarely on a single commutator.
Where you see the brass contact come inside the cap, it appears to take a brass bus bar over to the brush, but that bus bar is actually a wafer type device of some type. Look close, it is not a sold bar, but two plates of brass with something thin between them. I still have no idea what they are/do.
And on my motors it was presenting most of that 40 ohms. My fix? I scraped the top edge of both plates with a screwdriver and deposited some solder across the edge of the two plates, effectively shorting them out. I applied power to test and the motor sang!
All I can figure is it is some kind of current limiting device, or circuit breaker, or something the designer put in there and would deteriorate over time, thereby improving the replacement motor market.
Putting the armature back into the end cap with the brushes can be a bit tricky. Slip into the bushing against the brushes, then keeping a bit of pressure on it, use a jewlers screwdriver, or dental pick and pull one brush back until it clears the commutator. Lean the armature to that side with a little bit of pressure, and the brush should stay in place. Then pull back the other brush and the armature should slip down in the cap all the way.
The other tip is when you are slipping the motor casing back over the armature, keep a finger on the far end of the armature and one on the brush end cap. If you don't, as you slip the casing down on the armature, the magnets can grab the armature and pull it out of the cap and brushes and you get to start all over again.
Lastly, I think the back end of the motors have an open, hex/allen bore in them that you could use to turn the motor and mech while it was all still installed if you have to.
Hope that helps, I for one am glad I didn't drop $150 for new motors on my truck!
