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97 gtx 787 , no beep or power

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Travlash

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I just bought a 97 gtx for basically nothing. The guy before me fried the computer. I have seen it run, and know the engine is solid. Bought a new computer and dess key online. It is a good computer. When i put the key on the post, i get nothing at all. So i jumped the solenoid in the black e box. Didn’t really crank but heard the starter. Light on dash quickly blinked red and then diminished once the engine stopped its attempt to crank. So i cleaned all the grounds and cables to the battery and e box. Charged the battery up over night, and put in a spare solenoid i had. Still the same exact thing. I have a video. I can post a link to it if this thread gets any attention. Thank you.
 
I would have the battery load tested to make sure that is good. Did you measure the battery after charging that it was over 12 volts. If it is and you just press the start button without attaching the key, do the gauges light up? When you attach the key do you get the 2 beeps?
 
I would have the battery load tested to make sure that is good. Did you measure the battery after charging that it was over 12 volts. If it is and you just press the start button without attaching the key, do the gauges light up? When you attach the key do you get the 2 beeps?
The battery was fine. I did test after i charged it. Used another good one too. I get nothing when i click the start button. No beep when key is attached.
 
There is a schematic for the 97 GTX in the shop manual that you can access in this site. First check the the 5A and 15A fuses on the MPEM module. Check that the battery reads 12V when installed (nothing is dragging the voltage down). Check that the MPEM is also getting 12V on the Red-Purple lines measured to the Black line at the MPEM. If the MPEM is powered and is operational, it should be responding to those simple inputs (Start button pressed without key installed, key installed on post). There may be a static resistance test in the shop manual to check the MPEM, but those tests are not 100% conclusive.
 
There is a schematic for the 97 GTX in the shop manual that you can access in this site. First check the the 5A and 15A fuses on the MPEM module. Check that the battery reads 12V when installed (nothing is dragging the voltage down). Check that the MPEM is also getting 12V on the Red-Purple lines measured to the Black line at the MPEM. If the MPEM is powered and is operational, it should be responding to those simple inputs (Start button pressed without key installed, key installed on post). There may be a static resistance test in the shop manual to check the MPEM, but those tests are not 100% conclusive.
The fuses are fine. Do i need to have a key in or anything when i test to see if the mpem is getting power? Or should i be doing this when i jump the solenoid?
 
I'm telling you these things based on the schematic. With the battery installed, one of the Red-Purple lines should have 12V all the time. It is the line that comes from the start solenoid in the rear black electrical box. There is a 15A fuse in the rear electrical box that should also be checked if you do not see the 12V at that wire on the MPEM. The other Red-Purple wire at the MPEM goes to the Infocenter LCD display and probably is only active for about 30 seconds after either the start button is pressed or the key is placed on the post.
I think your problem when you short out across the top of the solenoid is different. If the battery is good and the engine does not crank, then either the starter is bad or the cables/connections to it are bad. There is probably a spec for the cable resistance in the manual, but I think it should be fairly low (a few ohms). The connections should be cleaned.
 
Jumping the solenoid has nothing to do with the MPEM or lanyard.
All jumping the solenoid does is send battery voltage directly to the starter. So.. if jumping the solenoid doesn't spin the starter it is either the battery, cables, starter or a locked up engine/pump.
 
The fuses are fine. Do i need to have a key in or anything when i test to see if the mpem is getting power? Or should i be doing this when i jump the solenoid?
Jumping the solenoid has nothing to do with the MPEM or lanyard.
All jumping the solenoid does is send battery voltage directly to the starter. So.. if jumping the solenoid doesn't spin the starter it is either the battery, cables, starter or a locked up engine/pump.
It’s spinning the starter and engine. The computer is fine. So where should i look for my problem
 
How do you know the computer is fine. It's not uncommon to get a bad one on ebay.
 
Please explain "jumped it".
Using a booster pack or a running vehicle is very well documented to fry the MPEM's.
 
Jumped the solenoid as i had previously mentioned
Any updates since February????? - electrical issues are always fun to chase down. You need to run through the entire ski, checking every wire and connector.....visual checks are worthless, you need to physically open, clean and close all connectors and check all wiring for continuity from point to point of each connection location. Time and patience is what it'll take.....all this is assuming the HARDWARE (MPEM, etc) is OK.
 
Any updates since February????? - electrical issues are always fun to chase down. You need to run through the entire ski, checking every wire and connector.....visual checks are worthless, you need to physically open, clean and close all connectors and check all wiring for continuity from point to point of each connection location. Time and patience is what it'll take.....all this is assuming the HARDWARE (MPEM, etc) is OK.
The solenoid was wired back wards
 
So did you get it fired up?
If not, you might need to get your dress key programmed to the computer since you had just purchased them.
 
My ski is having electrical issues as well. I checked all fuses and they are good. Not getting any power to the dash and no beep...If I bridge the solenoid with a screwdriver the engine cranks and tries to start. Does this mean it’s the solenoid that is holding everything up? Would a bad solenoid cause no power to the dash and starter/beeper?
 
My ski is having electrical issues as well. I checked all fuses and they are good. Not getting any power to the dash and no beep...If I bridge the solenoid with a screwdriver the engine cranks and tries to start. Does this mean it’s the solenoid that is holding everything up? Would a bad solenoid cause no power to the dash and starter/beeper?
Mike,

You might consider starting your OWN new thread.....and NO, a bad starter solenoid should NOT stop power from the battery to flow to the guages. if the battery is connected properly to the ski, you should be able to "wake the ski up" simply by pressing the S/S button once, the guages should come alive (the DESS key does not need to be connected at this point.

Bridging the solenoid with a screwdriver just sends battery power directly to the starter motor....the solenoid gets an electric signal from the S/S button (assuming the DESS is OK and the MPEM is OK). Make sure all the "little" wires and connected properly, all connections are clean, bright and tight and all ground wires are connected properly. Electric issues in ski's are a constant maintenance issue -> harsh environment afterall....electric, water and high impact vibrations.....EVERYTHING electric components LOVE....NOT!
 
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