Update:::Unidentified Electrical part on Allegro Bus

Don't go guessing as to what it is based on comments here. Make sure you KNOW what it is before installing something in its place. Even if it is an auto reset circuit breaker, do not replace it with one of the cheap ones from the auto parts store. Most, if not all, of those are not water tight. Mounted on the frame near the transmission it would need to be water tight. That one in the picture appears that it probably would be.

I would suggest you send your photo to Don Boyd at Tiffin, don.boyd@tiffinmotorhomes.com Ph: 256-356-0261 Ext 3824. He should be able to identify it in seconds.

A plain ol' terminal to attach any ol' accy

Thanks for all the good replies. The general consensus seems to be that it is a circuit breaker. Problem is that there is no amperage marking or part # of any kind on it. I agree, it needs to be waterproof also.

Thanks for the link to Don Boyd at Tiffin. I will send a picture to him as I would like an identical replacement.

BobGed wrote:
I would suggest you send your photo to Don Boyd at Tiffin, don.boyd@tiffinmotorhomes.com Ph: 256-356-0261 Ext 3824. He should be able to identify it in seconds.

I contacted Don Boyd at Tiffin, and he was almost certain that it was a circuit breaker rated at 135 amps. He also told me that this circuit powered up the dash and the ignition switch. He did say that this was a Freightliner chassis part and to contact Freightliner to get 100% verification on it and that they could supply it for me.

Thanks BobGed for the contact info for Tiffin.

hotjag1 wrote:
I contacted Don Boyd at Tiffin, and he was almost certain that it was a circuit breaker rated at 135 amps. He also told me that this circuit powered up the dash and the ignition switch. He did say that this was a Freightliner chassis part and to contact Freightliner to get 100% verification on it and that they could supply it for me.

Thanks BobGed for the contact info for Tiffin.

You're welcome. Don is very knowledgeable on most all things Tiffin. Hope Freightliner can take care of you.

hotjag1 wrote:

BobGed wrote:
I would suggest you send your photo to Don Boyd at Tiffin, don.boyd@tiffinmotorhomes.com Ph: 256-356-0261 Ext 3824. He should be able to identify it in seconds.

I contacted Don Boyd at Tiffin, and he was almost certain that it was a circuit breaker rated at 135 amps. He also told me that this circuit powered up the dash and the ignition switch. He did say that this was a Freightliner chassis part and to contact Freightliner to get 100% verification on it and that they could supply it for me.

Thanks BobGed for the contact info for Tiffin.

Disconnect it and see if the dash is dead, that way you know for sure.

It appears to be an older Hi-Amp circuit breaker like this.

Since these came in various sizes I would certainly verify the exact amp rating before you replaced it. Too large and you could have a big fire problem. Too small and it will continue to reset.
Auto reset circuit breaker.

Since you say that it had a 6 gauge wire hooked to one side and a 16 gauge wire to the other, it is probably not functional anymore. It may have been installed for a previous inverter or energy management system that is no longer being used. Certainly a 16 gauge wire cannot handle 135 amps and 6 gauge wire is only rated for around 60 amps.
I would either NOT replace it or verify with an electrical diagram for YOUR coach exactly what it was used for. If you are right about the gauge of the wires that are attached to it, it IS NOT 135 amps.

When you call the Freightliner help desk ( 1 800 385-4357), have the last 6 digits of your vin number handy.

While you're talking with them, ask for a wiring diagram for your specific coach. It will be a big help now and in the future.

Let us know what you finally determine the part to be.

Fred

Update: I called Freightliner and they confirmed that it is a 135 amp breaker that powers up the entire dash and ignition. I found one at Del City for about 2/3rds less than Freightliner or Napa. It will be here in about 3 days.

I do need to clarify one thing: There is a 6 gauge wire that comes directly from the battery to the circuit breaker, but there is "another" 6 gauge wire and a 16 gauge wire that connect to the aux side of the circuit breaker. I originally said that one side only had a 16 gauge wire attached, but indeed there was another 6 gauge cable also.

By the time I came in the house and posted my question(a few hours later)I didn't remember that there was a heavy gauge cables on each side. I only remembered the light weight wire on the one side. It only makes sense to have the same heavy cables on both sides, so I hope this clears up that question. Freightliner did tell me that the 16 gauge wire could go to any accessory that the coach builder needed a power source for.

Thanks again for all the helpful comments and suggestions.