Electrical conundrum!

fisjon
fisjon Forum Participant Posts: 2
edited October 2017 in Motorhomes #1

Hi everyone, 

This is my first post and I'm just hoping that there is an electrician amongst the members that may have a solution to my problem.

I have a Sprinter conversion with a Bonus PMS3 power Management system fitted. 99% of the time it works fine, but occasionally it refuses to supply 12 volt power. When I check the input from the battery it reads 12.65volts input on average, when I switch the unit on the input voltage drops to about 3volts. Strange!

If I leave it off for about 15 minutes and then retry it, it works. I have changed the unit on the warranty on the assumption that the unit was faulty but it looks like the fault is onboard the vehicle.

Any ideas would be helpful.

thanks

Comments

  • Unknown
    Unknown Forum Participant
    edited October 2017 #2
    The user and all related content has been Deleted User
  • fisjon
    fisjon Forum Participant Posts: 2
    edited October 2017 #3

    Hi Dorset Driver,

    Interesting that you should say that because when I took the van to the company that supplied the unit they said the same thing. Then they tightened everything up and said all good. Took it home and the same thing happened again a week later. Took it back and they changed the unit. (lots of mileage involved)

    It is a new battery and connections, so all clean and tight, but I will check all earths on the van just in case.

    Thanks

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