I’m an rv tech working on a 2014 Thor Tuscany with the following problem. The day shade is non responsive. Both the day and night shade motors have been replaced from United shade to msc motors. The relay was replaced a few months ago.
After replacing the motors, the night shade works as it should. The day shade doesn’t respond at all. I checked the motor by connecting it directly to a 12VDC battery: it goes up and down based on positive/negative wire contact. I checked the switch and I was getting 12VDC against the negative wire and orange/orange black wires, but with voltage drop at about .2vdc per second. When I checked the orange wire to the orange black wire it shows 4.6vdc. I switched to a different rocker switch and it does the same thing.
I checked the relay and when checking the negative to the orange or orange/black wire, I get 12VDC with rapid voltage loss, and when checking orange to orange/black I get 1.83vdc.
All the components seem to be good, I’m not sure why there is such a voltage loss. Thanks in advance for helping.
Only possibly, and then only possibly within that possibility:
Heat is expanding a loose ground or power causing less resistance as it swells and makes better contact.
Think thermal coil, by accident.
Only possibly, and then only possibly within that possibility:
Heat is expanding a loose ground causing less resistance as it swells and makes better contact.
Think thermal coil, by accident.
Toss it in the freezer then compare readings v/m.
It was the worst sbort I've ever chased.
Less resistance or more resistance? Less resistance and better contact indicates that it will eventually work over time. I think your response has me lost.
Only possibly, and then only possibly within that possibility:
Heat is expanding a loose ground or power causing less resistance as it swells and makes better contact.
Think thermal coil, by accident.
Toss it in the freezer then compare readings v/m.
It was the hardest short I've ever chased.
Actually it looks like you’re talking about a thermistor. Not sure what’s going on.
It has full resistance when it's not touching and less and less resistance when it touches and touches harder.
Touching wire not big enough to turn the motor or touching wire is unrelated and just a solder glob or stray single strand.
You have a very high resistance connection in the circuit. So high that the high resistance of the voltmeter causes a voltage divider and drops the measured voltage as you are measuring it. Do some resistance testing of the circuit from the known good source to the motor.
I tried this. I ran the day shade motor directly to an 18vdc battery and the motor moves the shade down, and when reversing the wires to the battery the shade moves up. However, after reconnecting it to the motor coach wiring, it behaves as before.
i could write a 1000 page novel on the freakign front shades in my tuscany
night worked as advertised but day shade is sat for a few days would not move, or it move up byt not down or move down and not back up.
i finally pulled it and bypassed the sensor on the motor and worked great until it burned up from to many volts, as it has an internal thing to drop voltage to 6 volts so its SLOWER than the night shade.
i finally after 6 years found a new motor and replaced it.
i have to go look for the place and part number
google search the part number and it will guide you to the place that makes replacements, i cant find my receipt
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retired Navy driving the short bus 2008 Tuscany 4056
I tried this. I ran the day shade motor directly to an 18vdc battery and the motor moves the shade down, and when reversing the wires to the battery the shade moves up. However, after reconnecting it to the motor coach wiring, it behaves as before.
Why would you use an 18 VDC battery on a 12 VDC motor? You had 12 VDC available right there at the dash.
Linear Mode
