School Bus Fleet Magazine Forums
Home | Profile | Register | Active Topics | Members | Search | FAQ
 All Forums
 Professional Garage
 Enter Forum: Professional Garage
 Electrical draw
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

New Member

5 Posts

Posted - 10/18/2012 :  08:18:15 AM  Show Profile  Visit wrench44's Homepage  Reply with Quote
I have a C2 Thomas that will run the batteries down over night but not all the time. It seams to do it after a rain. I have checked all of the electrical connection at the Balk head Module, Chassis module and the fuse panel on the fender for moister also check the alt for draw. I made sure the modules were going to sleep. Any ideas?

Advanced Member

United States
490 Posts

Posted - 10/18/2012 :  12:46:12 PM  Show Profile  Reply with Quote
Unplug the wiper motor overnight.

Is the wiper motor still running directly off of BHM outputs or is it running off of relays.

There have been a couple versions and variances of the circuit.
- Earliest - no relays - power from BHM to motor. Can convert to bosch relay
- next - single relay in old square fender PDM (not Waterproof)
- can conver to dual relay
- dielectric grease the relay pin-ins.
- Current - (EPA '10) sealed rectangular fender PDM = problem solved
- I am not sure what your problem is then....

I may not know the answer but I can usually find who does.
Go to Top of Page

New Member

1 Posts

Posted - 10/19/2012 :  01:08:46 AM  Show Profile  Visit Schwinnmb3's Homepage  Reply with Quote
Hello Make sure dash is going to sleep. A bad smart switch can keep it awake causing your draw.
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:

School Bus Fleet Magazine Forums © 2017 School Bus Fleet Magazine Go To Top Of Page
This page was generated in 0.03 seconds. Snitz Forums 2000