Blower motor won't work

1500 pickup not VAN ? no engine told and fuse boxes vary.
2 problems old car, I bet i can find 5 to 10 hands on me.
blower fails on high? or just lower speeds, if only lower fail that is the blower resistor block bad.
the blower can be hot wire tested, easy, if it is bad it fails now.
fuse f2 , FUSE BLOCK is blower 30amp goes to blower relay
relay is energized key on. Position
relay goes to blower Plus
blower minus, to control , on high control ground fan to ground G202
F2 is in the fuse block, (CAB)
fuse 2, is in PDC and if b low engine dies and blower. too. and vast.
fuse block means CAB box. fuse same place as flasher and CB1/2
blower relay is a the Steering support bracket (quote SM)
end blower, start, answer 2 (idle controls
NO engine told so talking EFI here is not easy. lacking key fact1.
hot engine (it hot 180f to200?) normal it must be.
hot engine 1500 is total loss of EFI idle controls.
IS CEL glowing, check engine light?
500 in drive hot 180f+ engine is same answer. lost controls of idle.
now the caused (lots)"generic efi"

1. ECU stuck in limphone mode, CEL glowing like mad.
2. IAC VALVE STUCK OPEN
3. VACUUM LEAKS. to air induction TB and intake manifold.
4. ECT reads 150f ,not 180F so yes, EFI stuck on cold startup for ever. bad thermostat, none lasted 25years, so....?
5. TB ,Tv plated gummed up, throttle plate gum up clean it.

see on line SM here.
https://eautorepair.net/Marketing/Default.asp

SM quote...

check and test motor under dash behind the glove box test resistor [fan speed ] and fan both connections are access able

look at the resister it next to the blower motor

It is located under the hood in the fuse and relay center. Consult your owners manual for detailed info. If you don't have an owners manual you can get one here from Dodge free.
http://www.dodge.com/en/owners/manuals/

It is the blower motor,or the blower relay module,near the blower motor,and check the ac/heat control unit,if the blower ,and relay module turn out to be good.

#26 40 amp orange fuse ---it is under the hood of vehicle in fuse box. Relay labeled "F" in passenger comp on juction block behind left side of dash is for rear blower motor, front blower motor relay is behind juction box.

if it works only on high speed you need a blower motor resistor you will find it close to the blower motor has three wire to it and looks like a small 1 inch by 3 inch piece of computer board material with two screws holding it.once you get it off you will find that one of the springs has lost contact.

Usually the Blower motor resistor replacement will do the trick. I would check the actuall fan

YOU CAN STILL HAVE 12.5VOLTS ON WIRE,BUT ONLY HAVE 2 STRANDS OF WIRE CARRYING IT..WILL NOT CARRY ENOUGH CURRENT TO RUN MOTOR..CHECK WHITE MAIN CONNECTOR UNDER DASH NEAR BRAKE PEDAL..TAKE APART AND LOOK FOR MELTED WIRING..ALSO CHECK WIRING AT IGNITION SWITCH CONNECTOR..THERE WAS ALSO A RECALL ON BLOWER MOTOR WIRING FOR THESE TRUCKS..CALL YOUR LOCAL DEALER AND GIVE THEM YOU SERIAL NUMBER AND MILEAGE..YOUR TRUCK MAY HAVE FELL THRU THE CRACKS IF YOUR NOT THE ORIGINAL OWNER..LET ME KNOW WHAT YOU FIND

Check the heat/ac relay first making sure it is working.remove it clean the contacts and reattach. Then check the Resistor component. It is usually located near the blower or on the blower motor itself.It is attached with a couple of screws and a plug between the blower motor and the wiring. Please vote if this helps you.