All DC power ports dead

[Mannwich4@gmail.com]

2017 Thor Hurricane - not a single power port or usb works. One of the cig lighters near my left leg driver seat worked for a while, but now it too died. I depended on it for our tpms. I’ve read many threads here but still can’t find the fuse or fuses causing this. Anyone have some directions to share? TIA

 

[ducksface]

We need to know what DOES work in your 12v system.

 

[Mannwich4@gmail.com]

Cab lights, driver/passenger fans, radio, power shade all work. All 110v stuff works well.

 

[16ACE27]

2017 Thor Hurricane - not a single power port or usb works. One of the cig lighters near my left leg driver seat worked for a while, but now it too died. I depended on it for our tpms. I’ve read many threads here but still can’t find the fuse or fuses causing this. Anyone have some directions to share? TIA

Get a multimeter
Goto YouTube University to learn how to use it.

Trace power and ground wires. It MAY be a fuse ( or two)
It may be a bad wire connection.
History says it's a poor common ground connection.

 

[Beau388]

The dash power ports and USB charger ports are powered by the chassis battery through the Ford power center under the hood. Look in the Ford owners book for the correct location and fuse number. Ford has made several different power centers with fuse locations through the years.

 

[PS89]

What floorplan is this?


What USB ports do you have that aren't working?

 

[10scDust]

Is the stow switch turned to the on position?
{Stow switch, store switch.}

 

[Mannwich4@gmail.com]

Thank you, I’ll check with Ford.

 

[Mannwich4@gmail.com]

Hurricane 29M (2017)

 

[Mannwich4@gmail.com]

None of the USB ports are working. Even the two in the bedroom don’t work.

 

[Mannwich4@gmail.com]

Stow switch is set to “Use”. I only turn it off when stored.

 

[16ACE27]

None of the USB ports are working. Even the two in the bedroom don’t work.

Completely different issue. The bedroom ports are powered by the house batteries, are prone to failure as well as improper installation (wired backwards).

 

[PS89]

Well, let's start with the power ports in the dash. Surprising your 2017 29M has a power point on the left side as my '18 WS 29 does not. Wonder if added by a PO or if Thor changed the layout...


In any event, I posted this yesterday on Thor FB group for an owner of a '17 ACE 29.2. It applies to your coach as well.

The 12V outlets in the dash are fed from fuse F22 in the under hood fuse box. Check/reseat it in case it's got intermittent contacts. After that, it's fed through the firewall and them mates with the Thor-supplied dash wiring harness. There is a Molex connector behind the center stack of the dash that has, in the past, had a tendency to loosen if it wasn't properly pushed together to lock it when it was put together. I had to do this on my 29M and secured it with a zip tie around the connector to keep it from coming apart again. Also had to remove the radio to get to it. YMMV....

 

[PS89]

Is the stow switch turned to the on position?
{Stow switch, store switch.}

That switch doesn't have anything to do with the front power points.

 

[Mannwich4@gmail.com]

Nice work PS89, F22 was the culprit! Replaced it and all I’d working again. Thank you so much!
How about a similar issue, but with the dash air conditioning? It just stopped blowing cold air on the way home from the Albuquerque balloon festival. It appears that the round ac button is not causing the compressor to engage. You can always feel and hear the compressor kick on, but now, nothing. Could that too be a fuse?

 

[Beau388]

Nice work PS89, F22 was the culprit! Replaced it and all I’d working again. Thank you so much!
How about a similar issue, but with the dash air conditioning? It just stopped blowing cold air on the way home from the Albuquerque balloon festival. It appears that the round ac button is not causing the compressor to engage. You can always feel and hear the compressor kick on, but now, nothing. Could that too be a fuse?

Not likely. The dash switch trips a relay sending 12 volt 10 amps to the compressors clutch. Carefully, with the engine running, you can bridge the circuit to the compressor's clutch using the coach's battery. That will insure you have an electrical problem. You can check the dash switch is getting power and sending it to the relay. If you don't find a problem with these test, it is best to take to a school bus or truck A/C repair place. Avoid a RV dealer or a simple car dealer.


The A/C system (except for the compressor) is made by Evans Tempcon and installed at the Thor MC plant. Another thought. Some area's have shops dedicated to repairing motor coaches. I know of three in the San Antiono area. All have a trained A/C tech.

 

[PS89]

How about a similar issue, but with the dash air conditioning? It just stopped blowing cold air on the way home from the Albuquerque balloon festival. It appears that the round ac button is not causing the compressor to engage. You can always feel and hear the compressor kick on, but now, nothing. Could that too be a fuse?

Maybe. There are a number of things it *might* be.

The A/C system (except for the compressor) is made by Evans Tempcon and installed at the Thor MC plant.

There are several significant exceptions to that. They include the low pressure cycling switch, relays, fuses, and a bit more. Plus, there's the biggie - this is a PCM-controlled compressor clutch. If the PCM ain't happy with all it's inputs plus its programming, it won't activate the clutch relay. Unfortunately, since this is a hybrid Ford/Evans system, it can get a bit convoluted to troubleshoot.

Fuses in the BJB to check: F02, F03

BJB: AC Relay

Check/swap those first and see if you get lucky.

1) BTW, how many miles are on this coach?
2) Do you have a scan tool or equivalent?