Foretravel Owners' Forum For owners and Fans of Foretravel Motorcoaches September 10, 2025 ...

Somewhere in that loom that is just below where the 1st pic. shows all those tie wraps should be a blade type fuse holder.  If not in that area I have no idea where they hid them.

Mike

Currently cleaning up the connections from the alternator.  They are pretty cruddy and one wire just snapped in half as soon as Trent grabbed onto it.  That could be the whole source of "low voltage" couldn't it?

Siobhan,

In your photos from last night, that does look like the right kind of connector for something going to the ECM.  That is called a Weather Pack connector.  It is gummy inside because when they put then together at the factory they put dielectric grease inside.  Helps keep them water tight.

What Trent is looking for is a similar type connector, but with only two wires, both entering the connector from one end.  The other end is like a cap.  When you pull the cap off you will see a small blade type fuse.  There should be two of these fuse holders in close proximity to each other.

Look at the link I provided in Reply #59.  In that thread, toward the end, there are 3 photos.  The 2nd photo shows the 2 OEM fuse holders.  Peter replaced both OEM fuse holders with the item shown in the 3rd photo.  If it turns out you need new ones, you should find these replacement fuse holders at the Advance auto parts store.

Look at the link Mike supplied in Reply # 70.  His 3rd photo shows the 2 fuse holders.

In both of the photos referenced above, it looks like the wires entering the fuse holders are ORANGE.  The holders on your coach may or may not be similar, but tell Trent to keep his eyes open for orange wires.

Keep up the good work.  You guys are a AWESOME team, and I know you can figure out this mystery!

Found this one by the starter batteries with orange wires.  Can't find anything in the engine compartment near the ECM.

That is definitely a fuse holder.  Is it the one supplying power to the engine ECM?  I don't know.  Check the condition of the wires going into the end of the holder.  Remove the cap and check the fuse.  If it is blown, you'll need to get a replacement.  Get several while you're at it, so you have spares on hand.

Currently cleaning up the connections from the alternator.  They are pretty cruddy and one wire just snapped in half as soon as Trent grabbed onto it.  That could be the whole source of "low voltage" couldn't it?

Though likely a problem (in terms of alternator output), since you have the generator running and powering the inverter charger which charges the house bank and the boost switch on charging the chassis battery this is likely NOT the cause of your current issues.

Said simply, your voltage readings at the batteries do not indicate that voltage is the problem.  That voltage getting to all the right places-- likely IS.

Maybe someone with eagle eyes can spot a fuse holder in these photos of the engine compartment?  I'm trying to look according to everyone's suggestions but I am not finding anything.

Brett, could it be that our inverter charger isn't working properly?  How might we know whether it is or not?

Here is a photo of the interface.  I'm not even really sure how that whole system works.

I can't see anything in the photo, but if your coach is the same as Mike's and Peter's, then the fuses should be somewhere around the area indicated by the arrows.  They may be completely covered up with electric tape, or hidden inside some of the ribbed plastic wire protector.

Also, you might look for them down in the area around the starter motor.  This is just a guess...and not too likely, because it gets really hot around the starter.  Wouldn't be a great place to have a fuse holder.

As you have now found that the alt, batteries and inverter/charger are working. Your next step should be to pull the batt cables all along their run (not just at the batteries) and wire brush them. You have a low voltage fault code and that's usually caused by high resistance in the power feed. A dirty/corroded connection will cause said high resistance and lower the voltage.

Yes, I believe Brett has been saying the same thing.  We are now moving onto cleaning up the starter and then the isolator next.

WE finally found one fuse holder so far.  How many should we be looking for?  This one had black wires coming out.

I don't know how many there are on your coach.  There may be only one.  Did this fuse holder look OK?  Was the fuse good?

Let's pray that this will be the fix. As it's cheap and not too hard to do.

The battery isolator is NOT a  critical part of getting the rig started/running. 

Short term fix so that you don't hurt the alternator is to wire the wire from the alternator B+ to the wire on the isolator going to the chassis battery.  Your wiring diagram has the numbers on it, or just trace the large-gauge wires. Even a bolt holding the two together will work.  Slip an old piece of rubber hose or something over the connection so no chance of that connection touching/grounding on any nearby piece of metal.

The component in the bottom of the photo labeled "start" is also in terrible condition and should be replaced.  Likely the start solenoid.

Basically clean up anything that looks that gnarly.