2014 Tiffin Allegro RED 33aa on a Freightliner XCM chassis with no start issue after changing the two solenoids in the hydraulic bay. One continuous the other intermitting. I have read all the previous post about no J1939 data but here is my problem.
A little history that may have something to do with this. Last summer when driving in a hard rain the windshield had a leak at the top. Water ran into the dash of the coach causing I believe a no power issue to the dash gauges for about 20 seconds. A little frightening when moving a 65 MPH. I thought the engine had died so I restarted while still rolling. All was fine the remainder of the trip. It also ran before I replaced the two solenoids. Now it won't start and there is no transmission display and the dash shows No data J1939. I have checked fuses and connectors.
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The transmission display has to be active ( lit up ) to start the engine .
You may not have found all the chassis fuses in your coach.
What series of transmission is your coach equipped with ? 2500 ? 3000 ?
Have you located the transmission control module ?
There is probably a VIM ( Vehicle Interface Module ) close to it that contains fuses for the shift display .
Look for a box 4"x4" x3" with a removable lid to expose fuses and relays , as in the box in the yellow circle below , second picture shows cover off.
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
Skip426, I think I have a 2500 series transmission. I have not found the transmission module yet. I did open the fuse box with the black cover located at the drivers front compartment. Is the module one of the black 1" square relay?
I don't know that you have a VIM, but it would look similar to Skip's if you do. Notice the multiwire blue and green connectors. Our older model Allisons have a power feed directly from the battery, very easy to miss when hooking up, or blow the fuse near the battery.
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"Bringing third world electrical work to first world luxury." RV makers of Murica!
If it ran before changing them, measure the voltage on each side of the solenoids large terminals. If these solenoids have something to do with the power to the transmission etc and a fuse was popped during installation you can at least find out if these solenoids are engaged.
If you find voltage on one large terminal and not the other side, then measure the voltage on the two control wires. If there is no voltage on either of the little connections, disconnect them and ground one of them and apply voltage to the other. Be prepared for a small spark, a clunk, and if your fingers are touching the little wires you might get a tiny jolt.
Solenoids are simple dumb electronic switches. Do this test on both of the solenoids.
If you happen to get the transmission to light up and better yet, the coach to start, then you need to find out which fuse supplies that particular solenoid.
This assumes you have 12 volts on one of the large terminals on each of the solenoids to start of course. It is possible to trip larger breakers and fuses but we can address this with more feedback from you.
I don't want to dive too deep here as you are getting excellent suggestions. But if you come to the conclusion you need to find out what fuse is powering the solenoids, do some research on the term, "Fox and Hound". This tester is an invaluable tool for an RV owner.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
Allison 2500 series will look like the first picture below ( stamped steel fluid pan ) 3000 series , second picture ( finned aluminum sump ).
I'll look for a picture of a 2500 series control module , 3000 series is the third picture below.
EDIT: Pictures posted in wrong order . 3000 series first , Controller second , 2500 third. Module on the side of the 2500 series is the Arens shift by wire stepper motor .
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
If you disconnected the chassis batteries to fix the other issue, look there for a missing wire.
I didn't remove any battery wires. I only turned off the chassis disconnect. Thanks for helping figure this out. I'm thankful this is happening in my driveway.
If it ran before changing them, measure the voltage on each side of the solenoids large terminals. If these solenoids have something to do with the power to the transmission etc and a fuse was popped during installation you can at least find out if these solenoids are engaged.
If you find voltage on one large terminal and not the other side, then measure the voltage on the two control wires. If there is no voltage on either of the little connections, disconnect them and ground one of them and apply voltage to the other. Be prepared for a small spark, a clunk, and if your fingers are touching the little wires you might get a tiny jolt.
Solenoids are simple dumb electronic switches. Do this test on both of the solenoids.
If you happen to get the transmission to light up and better yet, the coach to start, then you need to find out which fuse supplies that particular solenoid.
This assumes you have 12 volts on one of the large terminals on each of the solenoids to start of course. It is possible to trip larger breakers and fuses but we can address this with more feedback from you.
I don't want to dive too deep here as you are getting excellent suggestions. But if you come to the conclusion you need to find out what fuse is powering the solenoids, do some research on the term, "Fox and Hound". This tester is an invaluable tool for an RV owner.
YC1,
I replaced the solenoids because the jacks would not deploy. This all began when I was driving and a 40 amp fuse melted the holder and fuse. Someone behind me on the highway indicated a problem while they were passing me. She apparently saw the smoke when it fried. I'm heading out now to check the things that have been suggested. Film at 11.
Turning off the chassis disconnect does not cut all power to the computers, you may have blown a fuse in the process. The VIM is in the pic above, circled in yellow, it's just a box of relays and fuses inside, only for the Allison, IF you have a VIM. The fuse near the positive feed from the battery is another prime candidate, IF you have one.
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"Bringing third world electrical work to first world luxury." RV makers of Murica!
The 40 amp fuse in the HWH leveling system , should not have produced any smoke when it blew ( mine didn't ) the driver who saw smoke could have been trying to alert you to a different problem .
Do you have any chassis battery power to the dashboard ? Headlights ? Emergency flashers ?
The main power cable ; chassis batteries to dash ; on my chassis has a 135 amp breaker , but if that blew , you would have lost engine power.
Can you post a picture of the parts you replaced .
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99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
It's not unusual to have a fuse holder as shown in skips picture fail like that. Over time heat builds up and the contact surface loses connection. This resistance causes heat and will do exactly as shown. There may be no other problems beyond a blown fuse like that.
Just saying, in some cases just replacing the bad holder and fuse solves the problem.
I am not saying this will fix the op's current problem.
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Certified Senior Electronic Technician, Telecommunications Engineer, Telecommunications repair Service Center Owner, Original owner HR 2008
It's not unusual to have a fuse holder as shown in skips picture fail like that. Over time heat builds up and the contact surface loses connection. This resistance causes heat and will do exactly as shown. There may be no other problems beyond a blown fuse like that.
Just saying, in some cases just replacing the bad holder and fuse solves the problem.
I am not saying this will fix the op's current problem.
This is what my fuse holder looked like. I think that was making enough smoke for another driver to see.
I double checked every fuse and all were okay. My coach only has chassis fuses inside the drivers side front compartment. Of course there were 4-5 more in the hydraulic bay with the water proof cover.
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