Runs on high only? - Caravan Dodge Cars & Trucks

It's probably the switch , but testing to know for sure is alwasy a good idea .

Headlamps Inoperative - High Beams
Step
Action
Value(s)
Yes
No
1
Did you perform the Daytime Running Lamps (DRL) System Check?
--
YES - Go to Step 2
NO - Go to Daytime Running Lights (DRL) System Check
2
Disconnect the turn/hazard headlamp switch connector C1.
Connect a fused jumper between terminal B of the turn/hazard headlamp switch assembly harness connector C1 and ground.
Do the high beam headlamps operate?
--
YES - Go to Step 3
NO - Go to Step 4
3
Replace the turn/hazard headlamp switch assembly.
Did you complete the repair?
--
Go to Daytime Running Lights (DRL) System Check
--
4
Repair the open in CKT 1200 between the turn/hazard headlamp switch assembly. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?

Daytime Running Lights (DRL) System Check
Step
Action
Normal Result(s)
Abnormal Result(s)*
1
Turn the headlamp switch to the HEAD position.
Turn the headlamp dimmer switch to the LOW position.
The low beam headlamps are ON.
The high beam headlamps are OFF.
Headlamps Inoperative - Low Beams
2
Turn the headlamp switch to the HIGH position.
The high beam headlamps are ON.
The high beam indicator is ON.
The low beam headlamps are OFF.
Headlamps Inoperative - High Beams
3
Turn the headlamp switch OFF.
Turn the ignition to ON.
Disengage the parking brake.
The high beam headlamps come ON at a reduced intensity in approximately 30 seconds.
Daytime Running Lamps (DRL) Inoperative, Headlamp Switch Operates Normally
* Refer to the appropriate symptom diagnostic table for the applicable abnormal result.

Check the bearings. If the friction is high the fan will not run at rated speed. When it runs slower it uses more current and gets hotter...

Disassemble, clean and lubricate to make sure fan runs full blast and does not burn out.

Or if the fan has two windings, one for starting and one for running it is possible that the high speed run winding has some shorts in it resulting in more current and more heat.

Possibly oil too high a viscosity or sender is faulty.

Your van has dual diligent headlamp bulbs, that means each headlight has one bulb that serves as high beam and low beam. What has most likely happened is on one side the low beam filament has burnt out, and on the other side the high beam filiment has burnt out. The daytime running lights are just the high beam filament running on reduced power, so if the high beam doesn't work on one side, that same side will have no daytime running light. Replace both headlamp bulbs with matching, good quality bulbs.

the resistor

it more then likey a lose wire or bear one. run the line down. i think that the high beams run on diff. fuses. you can try that!

check your IDLER

turn on ac and see if fans come on ,,see if fans or fan kicks into high after a little while ,look for reason why fans or fans do not run with ac on they have to run ,relay? or high side switch check preasures on ac ,low side and high,high side may be to high for fans or fan to cool down ,,ac problem or to much freon,,,radiator new?

May need a high blower relay. Under fan motor on firewall.

replace that relay.