BAC Forum

General Boards => Technical Support => Topic started by: John Demartini on February 25, 2023, 07:40:39 PM

Title: Loose wires by trans / curbside.
Post by: John Demartini on February 25, 2023, 07:40:39 PM

Recently noticed two loose / detached wires hanging down on the curb side of the transmission.  One is marked ground, while the other is marked "553 Low Air PSI Switch".

Can anyone tell me where I should be looking to see where these came from, or should be going?  I can only assume a previous wire repair or bypass created this situation.

Thank you for any suggestions.

Title: Re: Loose wires by trans / curbside.
Post by: Steve Huber on February 25, 2023, 08:52:04 PM

The Low Air switch wire should run from the low air switch to firewall connector C1. Is the wire (s) broken or do they have ring terminals crimped to the ends? If broken, (no terminal), I'd look for the other end dangling from the switch, but I'm not sure where it's located on your coach. The ground wire probably comes from the same location.
Sorry I couldn't be more help.
Steve

Title: Re: Loose wires by trans / curbside.
Post by: Steve Huber on February 26, 2023, 03:11:35 AM

John,
If I had to guess, I'd suspect the switch is near/at the rear air tank. Should be located just forward of the rear axle.
Steve

Title: Re: Loose wires by trans / curbside.
Post by: John Demartini on February 27, 2023, 01:51:16 PM

Thanks Steve.

The wires are not broken, they have round terminals fully intact.  I'll look for that switch.  Very curious why they have been left disconnected and why I have no consequences that I'm aware of...

Thanks again.

Title: Re: Loose wires by trans / curbside.
Post by: Eric Maclean Co-Admin on February 27, 2023, 11:34:28 PM

John
Does you low air warning buzzer work ?

If not the wire you are referring to should be connected to the low air switch mounted on the top of the upper air tank
You should be able to see it from under the bed or by looking above the battery area it will be a round switch screwed into the air tank .

It will look like this

https://www.napaonline.com/en/p/MBIBE13241?cid=paidsearch_shopping_dcoe_google&campaign=GSC-Towing&campaign_id=8911645606&adgroup_id=106416389246&adtype=pla&gclid=CjwKCAiAxvGfBhB-EiwAMPakqvcFLYYh9P9HUVVE4CND4Sj_eQzGsj_HgH-jwV_i0Lnt0pBXoTlolhoCjwAQAvD_BwE&gclsrc=aw.ds&


Hope this helps
Eric

Title: Re: Loose wires by trans / curbside.
Post by: John Demartini on February 28, 2023, 04:36:52 PM

Hi Eric:

Buzzer is audible during psi build-up after starting motor.  It's never sounded any other time.

Thanks for the image.  Getting back to this after our long awaited snow season is over in New England.

Thank you,

Title: Re: Loose wires by trans / curbside.
Post by: Eric Maclean Co-Admin on February 28, 2023, 06:51:29 PM

I hear ya about the snow I'm from Ontario Canada and am currently in Nevada.
Good luck up there waiting for spring.

Eric