30 amp starter fuse keeps blowing on 98 cherokee

Short circuit most likely in rear light wiring

USA car?
what engine , gas or diesel.,what size is it?
where is fuse located, Green = 30amp
in the cab, no ,no 30amp in cab. so is below.
or in the PCD box under hood,
here is PDC,
here is fuse f15, which i think is HBL
diesel HBL is f15
gas HBL is f11

fuse 11 is 3 up from bottom right. gas only.
fuse 7 is 30amp too in pDC
and runs headlamp controls or DRL, got DRL
fuse 8 diesel? see fuse 7 answer gas.
in canada, they have DRL , daylight running lights.
we dont.
but fuse 7 30a runs that.
PDC fuse 4 30am runs ASD and if blown diesel engine dies.

HBL is fuse 15 or F11
or is Fuse 7 or 8.
which blew, ive not a clue,



http://www.morris4x4center.com/knowledge-base/index.htm?utm_source=cj#service

i had this problem with my 1999 jeep grand cherokee laredo with the brake lights it kept popping fuses right after the ignition was turned on try putting a higher amp fuse in place of the old one that keeps blowing then check for shorts to the starter and check grounds and wires and also the transmission issue check the fluid and then if the fluid is fine change the transmission filter the filter may have not gotten replaced when the transmission was rebuilt and may be clogged or dirty

This 30 amp fuse, If it blows when cranking, it is usually the starter dragging, if it blows by just turning the key on it is usually the fuel pump drawing too many amps.
I hope this helps.

Is it the ecm fuse. Check the o2 sensor wires. On this model sometimes they rub on the rear driveshaft and blow fuses.

YOU GOT A IGNITION WIRE TO STARTER SHORTING TO GROUND.

Check for any loose or frayed wires either near the fuse box or further down the line. If this does not apply then I would put a fuse that takes a little more amps to blow.

Hello There

15 Amp sounds too small. It should be around 25 -30 Amp. You need to double check the size of fuse needed.

Hope this helps.

The 30 amp fuse is most likely for your starter. Check that the red thick wire (could be black as well) leading to the starter and starter solenoid is properly attached and is not touching anything that would short it out and therefore blow the 30 amp fuse. The short may even be inside the starter in which case it will need to be replaced or repaired. Hope this helps.
Alex