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1979 Ford 1500 diesel issue

M

Moles

New User
I recently accidently installed my battery in reverse polarity and now it won't start after putting the battery correctly?
 
Won't start as in everything dead? Or the starter cranks but won't start?

If everything is dead, may have blown a fuse link, or burned out the amp meter, or burned the main feed wire.
Look all the wiring over, especially the power wire to the alternator. Should be battery voltage on that wire
all the time.

If it cranks but won't start, could be the kill solenoid not getting power.

The alternator may also have been damaged.
 
That's a bad connection somewhere.

You'll need a test light or volt meter. Turn the lights on, leave them on to load the system, hit the starter
and when the lights go out start at the battery posts, see where you loose voltage. Need to be systematic
about it, checking one connection at a time until you find the bad connection.

Connecting the battery backward put a huge amp draw on the electrical system. Look for clues, like a melted
connection, or heat discolored insulation.
 
Will add...

Be absolutely sure the tractor is in neutral and stay clear of moving parts! Anything is possible, it could start on its own if there is a melted wire harness. Also have a means of quickly disconnecting the battery and have a fire extinguisher handy!
 
Ok looks like obviously you've been there done that and to be clear when I refer to lights I'm referring to the one's on the dash at the ignition switch, I turn key and glow indicator comes on as well as ignition light but turn key and it clicks and lights go out.
 
Yes, that's the same thing. If you have headlights, turn them on too, you want to test the electrical system
under load.

What you have is called a 'high resistance connection' somewhere. As soon as there is a load, the circuit
goes open. What you want to do is find where the voltage stops.

Start with the battery cable connections, work toward the power to the rest of the system. Usually there is
a smaller wire on the same post of the starter solenoid as the battery cable. If you have power to the
solenoid, start tracing where that wire goes, usually to the amp meter or a fuse block.

First be sure you have a good battery to work with.
 
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