Light on ,Battery boost

LonBoy · 11-21-2011, 10:13 AM

What I do buy a lemon?
What would make my light stay on ?
I cant find anything on the relay/contactor they use to hook all the batts together Im sure it has one .
Will it hurt the unit to run it with the light on. does not seem to be affecting anything else.

garym114 · 11-21-2011, 12:33 PM

It would help to know the year and model.
The light may be on because the boost switch is stuck or broken.
The switch controls an interconnect solenoid. The only time you should get the light is when the switch is on, it is spring loaded to return to off.
The interconnect solenoid connects the chassis and coach batteries together. It should operate automatically and connect the batteries together when either the coach or chassis batteries are charging so all will charge. You don't get the boost light during auto operation. It auto opens after a while when charging stops.
If your booster switch is stuck or broken and the solenoid is actually energized it will drain all batteries in a few days because the solenoid draws a couple of amps.
On mine there is a 1 amp fuse on the DC fuse panel for the solenoid.

LonBoy · 11-21-2011, 12:41 PM

Sorry about not putting down the yr and make the title says 04 but all the papers for the sign off of the coach say 2003 .Its a coachman 354mds 300HP cat diesel and Allison six speed for tranny Waiting to get tires so im not driving it just to the tire shop and thats farther than i want to go on these tires .thanks for the quick come back I need all the help I can get Had a Class -C but there is nothing on the coaches that match and I know very little bout a pusher.