Re: step switch

by fedex Fri Dec 13, 2024 12:40 pm

I still haven't solved this problem. But from another post I found on the web. Clive Mott of the MMM publication, states that the wiring goes through a relay connected to the fridge, I've checked the wiring diagram and it appears he's right. I've removed the fridge vents and there's a lot of wiring there, but I can't find a relay. Has anybody any idea where it may be located. Thanks in advance of any replies. (Merry Christmas all).

by The Bargee Fri Dec 13, 2024 1:27 pm

I think you may find that the fridge/step relay is part of the EM40.

If the fridge works on dc with the engine running then the relay should be working for the step as well.

by fedex Fri Dec 13, 2024 4:25 pm

Thanks for your reply, but some where in my van is a relay that controls the fridge and the step I just need to find out where it is. cheers

by Peter Brown Fri Dec 13, 2024 5:17 pm

If you have a Sargent EC325, 328, 500 or 700 the relays are in the EM 40/50 (dependant on the base vehicle). If MES or an earlier Sargent system they will be discrete relays, the step one near the door behind a fridge vent or under the oven and the fridge one possibly under the drivers seat - but no definitive answer.

by fedex Fri Dec 13, 2024 6:50 pm

thanks peter

by fedex Wed Jan 15, 2025 3:08 pm

Thanks Peter, mine is an EM50 on the pillar behind the drivers seat, found the red relay, but without causing damage as is won't budge I tapped it a few times and the step is now working. I would like to find out how the relay comes out, just in case it fails again. thank you all for the advice.

by Peter Brown Wed Jan 15, 2025 3:23 pm

The relay is soldered direct to printed circuit board, if you are not experienced in fitting/removing components from such a board, do not try.

Sargent will repair or supply a replacement EM50. Apuljack electronics manufacture a more robust replacement unit www.apuljackelectronics.co.uk , it probably worth talking to both before deciding what to do.