jennkent5454

here comes a complicated question-
I have a 1998 seadoo challenger 1800, It had and electrical short and I believe it shorted out the MPEM. I had a seadoo mechanic remove the original MPEM and replace it with 2 separate MPEMs from 1996 SPXs.
The jet boat runs fine. the 3 issues I have are as follows:
1. both of the tachs and the speedometer do not work. they have power because they light up, the mechanic says the were all three shorted out by the above mentioned electrical problem. is there a way to test the gauges? is there another gauge out there from another PWC that can be swapped out for these that is cheaper than the original?
2. the deck lights do not work, I dont think these run off/through the MPEM any how, what would be the easiest way to test these lights to see if they didn't get wired back correctly or at all?
3. with having two MPEMs now, he had to add another DESS & lanyard, which means there are now 2 DESS post. is there a way to wire both DESS posts into one ? and make it where any lanyard will work?

is it possible to put in two separate MPEM's out of a seadoo PWC's instead of replacing the single MPEM that is currently in this boat? a local independent seadoo mechanic says he can do it for me.

I was given this 1998 sea doo challenger 1800, it has an electrical short, it always blows the fuse that is next to the battery, there is 3 fuses but only blows one. I poked around and could not find any exposed wires so I took it to a boat shop, they say they cant figure it out either and I need to take it to a sea doo dealer. The previous owner said the sea doo dealer quoted $1500 to fix it so the bought a new boat. is this a problem with the big black box where all the wire harneses plug in? I think its called the MPEM? if this is the problem can buy a new or used one and just swap them out or is there more to it than that?