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5A fuse blowing

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jons68

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Hello All,
First post so hang in there with me please. Matching 98 GTIs. Interchangeable keys and parts. 1 ski keeps blowing the 5amp fuse in the storage compartment :o
If I hook onto key it blows. If I push start button with or without key it blows. I went thru 11 fuses interchanging parts from my other ski. No luck. Swapped computer. Blown fuse, swapped entire electrical box by battery-blown fuse. unhooked key switch- start button blow fuse. Anybody have some ideas. continuity good and switches when open/closed etc etc etc. Please Chime in
 
Luckily at the bottom of this post there is a list of posts with "5amp" fuse issues. I will start reading them all. WELL after reading them all
I'm thinking the stator is bad. Not sure how that happens after just sitting under a cover all winter. Since I am able to swap computer, rectifier etc and fuse still blows I will read up on testing stator and try that in the morning.
 
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UPDATE
After unhooking every connection including the stator and reconnecting one by one the 5 amp fuse held until the stator plug. It blew the second I connected it. Continuity between 2 yellow wires showed good but not sure on proper procedure for ohm test. Anyway my buddy works service department at the local dealership had me drop it off yesterday. They dont work on skis beyond 2000 but is working on mine. Will update when I hear back in couple of days for the folks that might be having same issue. So glad I had an identical ski that I could swap the computer out of or I would be digging out a perfectly good diode.
 
UPDATE: Well as you can imagine the dealership called and said the stator tests good and its the mpem. I had to explain 3 times I swapped the mpem out with my other identical ski and it blew the fuse as well. So in the morning im heading down to the lake and pulling the mpem out of my perfectly good running gti and taking it to the dealer to prove I should be the mechanic at their shop. Will follow up.
 
Well the dealer told me the mpem is bad. WRONG-I picked up the ski and only charge $45 for diognostics. Brought ski home and 1st thing I did was check battery (took out of ski for this test). Havent checked it yet so why not. It showed 11 something volts and dropping single increments while I have meter hooked to it. It ran down close to 10.1 volts while watching. So I have a cell short apparently. Will put another battery on ski when I get home from work. That's probably been my problem the entire time.
 
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Generally a bad battery will not pop fuses... But,, a bad battery does create many issues,,, So replace it and see what happens,, Good luck with it,,
 
Well no vts and another battery didn't fix the problem. I blew the 5A 3 more times. Getting off work now and going to start ohm testing from one end to the other. I will find the problem but it is frustrating. Will update when something new happens. OH, I did bench test the mpem. Hooked 12 volts to spade 24 and ground to spade 25 and didn't blow the fuse just to make sure it really isn't the mpem.
 
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I need some help with solenoid test. I followed the manual to do ohm test. I get 0s. no continuity between post. What I want to know if I take it out can I perform ohm test just the same as if it were wired up? PLEASE respond as im doing all this right now. Thanks for any feedback!!!!
 
jons68 said:
I need some help with solenoid test. I followed the manual to do ohm test. I get 0s. no continuity between post. What I want to know if I take it out can I perform ohm test just the same as if it were wired up? PLEASE respond as im doing all this right now. Thanks for any feedback!!!!
Click to expand...

It will be Zero when activated and open when not. It will act the same in or out of the ski.
 
Coastie, I guess my question is in the manual it says the primary winding should ohm at 5 ohms (static test) and that's where im getting 0. I also hooked the stator up but unplugged signal wire to solenoid and the 5a fuse didn't blow. Any thoughts?
Thx!!!!!
 
Coastie, just called a buddy, Nevermind that last reply. I was testing winding incorrectly. I think I have to check plug in connectors for that 5 ohm. ugh im chasing tails. I will figure it out!!! Solenoid windings ohmed at 4.8-9 so Im gonna check that off the list. on to the start stop switch. It should ohm at 0 and I get open when pushed button. But get continuity when I check that when pushing button. Following exact procedure in the manual.
 
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jons68 said:
on to the start stop switch. It should ohm at 0 and I get open when pushed button. But get continuity when I check that when pushing button. Following exact procedure in the manual.
Click to expand...

Yes,, the windings are a different story..

In the words I used of your quote above, I'm not really following you.

Please clarify if you can.

You say you get Open when the START/STOP button it is pushed. But you also say you get continuity when pressing the button.

Am I reading you wrong?
 
Try unplugging the wires that go to the MAG SECTION see if it still blows the fuse. I am at that point. Plug in the mag it blows fuse. Still have no beeps or gauges!
 
I spent 15 min talking to a Sea Doo repair shop owner. He states the MPEM gets feed power through the Stator. I have gone all over my Ski. Stator is shorted to ground. OH JOY, it's behind the fly wheel.
 
Without getting into a lot of mumbo jumbo, cause I got to get back to my job, I'm on nightshift, someone has jump started your ski. Believe it or not, this happens quite often from people who don't understand, you can't jump start these skis.

Your engine runs on a 12 vdc starting circuit. When the motor starts, the Magneto puts out as much as 14.5 vdc.Y You have a voltage regulator that controls that. When you jump start, do not start that other motor, then you are supplying your ski with 12 volts. IF you start that other motor, you are supplying your motor and computer, with 14 volts, without the regulator to control it for you. That is when you blow the 5 amp fuse, that protects the diode in your computer. There is a possiblity, you shorted your magneto, but I doubt it.
 
Not mine. Had ours 3 years and I know the last owners did not jump start them. Their son is very knowledgeable about them. The stator has been replaced on this ski before. The wires are soldered and shrink wrapped before the plug. It has a new battery too.
 
Do you know of a website or have a link to something that would assist me, I have the same problem of the 5amp fuse blowing.
 
I have been away for a few days. Sorry guys. But I am still poking on the dang thing. I ohmed the stator yesterday. It is in spec. Doing everything by the manual. I am going to lake today to get the mpem off the other matching ski which I have already done once before just to be able to rule out the mpem. So far I have tested via manual
1.start stop switch
2.dess post
3.selenoid
4.stator
5.brand new battery
6.mpem 12 volt bench test 24spade+ and 25-to ground NO BLOWN 5AMP FUSE
7.swapped rectifier with other ski
Any other test I should be looking to do that I have not done yet?????
 
The reason it blows the 5 amp fuse when the stator is hooked up is because that is where it pick up system ground from, I have seen several people on this thread state that it blows the fuse when the stator plug is hooked up, that is why.

To totally eliminate the stator from the picture unplug the stator plug and find the black wire in the plug, remove the black wire from the plug and ground it to the case, if it still blows the 5 amp fuse the stator is for sure not your issue.
 
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