What would cause my alternator and battery to keep dying in my 1991 dodge caravan

SOURCE: installing an alternator belt on a 1991 dodge grand caravan

for the 91 caravan as you requested , there is 3 engine choices , here is all 3 . cheers .

SOURCE: 1991 Dodge Caravan - Transmission problems

BELIVE ME THIS HAPPENED TO ME AND IT WAS BECAUSE MY OIL WAS LOW CAUSING THE ENGINE TO REV HIGHER TO MAINTAIN SPEED.DO YOUR SELF A FAVOR AND CHECK (ALL) THE FLUIDS IN YOUR VAN 1'ST.HOPE THIS HELPS

SOURCE: 2005 Dodge Caravan with Dead Battery. Replaced

Disconnect battery from vehicle overnight to check for internal battery drain.......just take one of the cables off.
If the battery is still up and starting the vehicle after being disconnected after a day or two......the drain IS in the vehicle and will have to be checked again.
Do it yourself.
Buy a cheap 12 volt test light.
Place it between the cable you removed before.
One end on the battery post and the other on the cable end.
Now....with the key off......
If the light glows brightly....you have TOO MUCH drain.
We want a dim glowing light.
The dim light is just the memory circuits in the electronics and OK.

With the doors closed....take out one fuse at a time until the light glows dim.......the fuse that dims the light is the problem circuit.
If no fuse dims the light...remove relays one at a time.
Remember....some fuses and relays could be in the engine compartment and under the dash.
If no relay dims the light disconnect ALL alternator wires.
Remember....anything that uses power will make the light glow ....keep those doors closed (we do not want interior light drain affecting the test ) and if you have a under hood light check it first by removing the bulb.
We do not want false readings.

SOURCE: 2004 Dodge Caravan won't start...just a clicking noise...

Check the battery first. Just because the lights are on doesn't mean it has enough power to start the van. If you or the van has a volt meter, the battery should read at least 13-14 volts to be good. If the battery is good then the alternator is good and we move on to the starter solenoid. I'm sure it's one of these. Do the lights go off or very dim when you turn the key? If so then battery.

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Ronny Bennett Sr.

• 6988 Answers
• Posted on Feb 08, 2010

SOURCE: 2001 Dodge Grand Caravan battery light is on.

The alternator has a bad diode in the diode bridge in the alternator,this turns the light on,even though the alternator checks good,and is charging correctly,there is a bad diode,this diode ,along with others,changes ac voltage to dc voltage,if not replaced,it will start causing components to go out.