864 REVERESED POLARITY WONT START

[Kevin Wheeler]

I reversed the polarity on new battery install ( it was a bonehead moment - bad day) and fried the starter and probably the alternator. Had to replace the fuse for the panel to light again so I could try and start the machine. Upon correct battery install it would turn over one time and that was it. If you turn the key off then try and restart it will turn over one time. It will not start. I replaced the starter and it does the same thing. If you jump it at the starter with the key on it will continue to crank but will not restart. Any suggestions?

 

[mrbb]

I would check all your fuses, you may have blown more than just the one

 

[Kevin Wheeler]

I would check all your fuses, you may have blown more than just the one

i have done that and they all appear fine.

 

[ZekeSkyree]

That is very odd. If you have a primary solenoid, one before the starter, it may be cooked. Still it is very odd that it turns over at all. I would expect it to not work at all if you had something blown in the path to the starter. Have you tried jumping the starter directly from the battery? Might give you a clue if it fires right up, or does the same thing ..

 

[RedNeckMike]

I would check your fuel solenoid and any other solenoids involved in the starting process also

 

[FJRDarksider]

Not sure if there is a diode somewhere in the flow of power but after doing the same thing you did (reversing polarity), and after countless hours of searching for the problem, turned out I blew a diode (power was blocked in both directions rather than just one). In fairness it was a older car but thought I would put it out there.

 

[Kevin Wheeler]

That is very odd. If you have a primary solenoid, one before the starter, it may be cooked. Still it is very odd that it turns over at all. I would expect it to not work at all if you had something blown in the path to the starter. Have you tried jumping the starter directly from the battery? Might give you a clue if it fires right up, or does the same thing ..

It does the same thing

 

[ZekeSkyree]

Ok, probably not the starter, so I would suspect something in the grounds. Check all grounds, starting at the battery and going to the chassis. If all is good try jumping the starter with another battery.

With jumping the starter directly you only have starter, battery and cables/grounds ... It has to be one of those.

 

[foton]

some models have a main fuse near the battery ,I think it has a high rating like 100 amps ,might want to look for something like that,unsure if yours has anything like that. Might want to look for a electrical diagram to check out potential areas of where damage could happen with a polarity reversal.

 

[Hiram]

When testing fuses, remove the fuse completely from the mount and test for both continuity and resistance against a known good element. I have seen fuses with multiple elements burn one but not all, continuity tests good but it doesn't allow enough current through to do the work.

 

[thwerench]

Seems strange that any starter would only turn an engine over one revolution and stop ??
Maybe it’s building up hydrologic pressure somehow and that’s preventing the engine from continuing turning over ?
What else could load up the engine and lock it up then bleed off ?

 

[Fabricator]

Does it have the BICS? If so, you may have blown more than just fuses.

 

[shankatank58]

I trust you have charged the battery. Just because its new doesn't mean it's charged. Rare today but used to be fairly common. New batteries can also be bad. I would do a load test on it and work from there.

 

[Sapientoni]

I suggest you try to turn it over with a wrench on the crankshaft. I agree with thwerench that is sounds like hydro lock. Maybe rain has gotten in and filled one cylinder. Don't force it if you get a solid feeling stoppage. You can bend rods and break pistons/rings.

 

[foton]

you could always try this, remove the glow plugs if equiped if not fuel injectors and see how it spins over then. It might be a good idea to look at your oil and coolant ,make sure there is no cross contamination ,disreguard if duetz.

 

[spitzair]

Wait a minute guys, unless I read his post wrong he's saying his engine turns over and will continue to turn over but not start if you jump it at the starter so I don't think there's any hydro lock or anything wrong with the engine itself, just that when he tries to start it with the key it won't turn a full revolution... There must be something in the electrical that got sizzlefried when the battery was hooked up backwards, but what that might be I have no idea...

 

[thwerench]

Spitzair is correct. I think I misread this post. Kevin does state the engine will continue to crank if power is applied right at stater

 

[Hiram]

Does this vehicle have an electric fuel pump?

 

[Fabricator]

I reversed the polarity on new battery install ( it was a bonehead moment - bad day) and fried the starter and probably the alternator.

Upon correct battery install it would turn over one time and that was it.

I replaced the starter and it does the same thing. If you jump it at the starter with the key on it will continue to crank but will not restart.

Ok... As Spitzair said, I went back to reread the initial post.

So it sounds like the battery and starter are good (continues to crank directly). That it only cranks once with the key is a bit odd, but again I ask if there is BICS on the machine? More than just a key switch may interfere with cranking. The 864 should be a Deutz diesel, so no ignition issues to worry about (like a fried coil).

 

[Kevin Wheeler]

Sometimes we do stupid things. I was able to go back through everything this past weekend and realized i had not put a fuse in the fuel pump slot. So that being said- If your machine will only turn over one time and stop - check the fuel pump fuse. Thank you to everyone who to their time to help me with this problem. I greatly appreciate it and I am sorry to have wasted your time.