1991 DODGE SPIRIT 2.5. HEATER FAN INOP. NO PPOWER TO FUSE BLOCK FOR BLOWER, BACK-UP LAMP, PWR WINDOW CIRCUIT (PWR WIND NOT USED- MAN. WINDOWS). ALSO FOUND 2 BURNED WIRES UNDER DASH- PARKING BRAKE SWITCH, & ANOTHER WIRE- ALL INSLULATION BURNED OFF VISIBLE, HAVE NOT YET UNWRAPPED HARNESS & TRACED FURTHER. ANY SUGGESTIONS WHERE TO CHECK? (AM SUSPECTING TO TEST IGN. SWITCH NEXT)

7-BATT MAIN 1
60A
Fuses: •
CIGAR/DLC/APO FRT
• CLUSTER BATT
• CTSY LAMP
• ON STAR
• PWR LOCK
• PWR MIRROR
• RAP RELAY
• RR PWR SCKT

look below for above listed componet's , pull those fuse's one at a time till arc stop's ,then you found your problem circuit . Do you know where the I/P fuse box is ?
Fuse Block- I/P
Right side of the I/P, in the right front door opening


Fuse Block-I/P Label
Fuse Block-I/P Application Table Fuse/Circuit Breaker
Rating
Description
BCM PRGRM
10A
Body Control Module (BCM)
ENHANCED EVAP/AWD
15A
Evaporative Emission (EVAP) Canister Vent Solenoid, Clutch Pump Check Valve
CIGAR/DLC/APO FRT
20A
Auxiliary Power Outlet-Front, Cigar Lighter, Data Link Connector (DLC)
CLUSTER/BATT
10A
Instrument Panel Cluster (IPC)
CRUISE
10A
Cruise Control Module (CCM), Cruise Control Release Switch, Cruise Control ON/OFF Switch
CTSY LAMP
10A
Body Control Module (BCM)
DRL
10A
Daytime Running Lamps (DRL) Control Module
HVAC/DIC/DRL/HEATED SEAT
10A
Air Temperature Actuator-Left, Air Temperature Actuator-Right, Daytime Running Lamps (DRL) Control Module, Driver Information Center (DIC), Mode Actuator, Rear Window Wiper/Washer and Multifunction Switch (Heated Seat Switch), Recirculation Actuator, Relay Block (Rear Window Defogger Relay)
ELC/TRAILER
25A
Auto Level Control (ALC) Air Compressor, Auto Level Control (ALC) Air Inflator Relay, Auto Level Control (ALC) Sensor
FRT HVAC HI BLWR
30A
Blower Motor Resistor Assembly
FRT WPR/WSHR
25A
Windshield Wiper Motor, Windshield Wiper/Washer Switch
HAZARD
15A
Turn Signal/Multifunction Switch
HEADLAMP
20A
Daytime Running Lamps (DRL) Control Module, Headlamp Dimmer Switch, Headlamp Switch
HTD MIRROR
10A
Outside Rearview Mirrors-Left, Right
HVAC/BLOWER
25A
HVAC Control Module
IGN1
10A
Body Control Module (BCM), Instrument Panel Cluster (IPC), Left Rear Side Door Actuator Control Module, Rear Object Sensor Control Module, Right Rear Side Door Actuator Control Module, Stop Lamp Switch
LH HEADLP HIGH
10A
Headlamp High Beam-Left
LH HEADLP LOW
10A
Headlamp Low Beam-Left
LH T/LP
10A
Tail Lamp-Left, Trailer Rear Wiring Harness
MALL/CLUSTER
10A
Body Control Module (BCM), Instrument Panel Cluster (IPC)
ON STAR
5A
Vehicle Interface Unit (VIU)
PASS KEY
10A
Theft Deterrent Control Module
PCM/ABS
10A
Electronic Brake Control Module (EBCM), Fuse Block-Underhood, Powertrain Control Module (PCM), Park/Neutral Position (PNP) Switch
PCM/CRANK
10A
Powertrain Control Module (PCM)
PCM/PASS KEY/CLUSTER
10A
Instrument Panel Cluster (IPC), Powertrain Control Module (PCM), Theft Deterrent Control Module, Instrument Panel Cluster (IPC), Powertrain Control Module (PCM)
PWR LOCK
20A
Body Control Module (BCM)
PWR MIRROR
10A
Outside Rearview Mirror Switch
PWR QTR VENT
10A
Auto Level Control (ALC) Air Compressor, Auto Level Control (ALC) Sensor, Rear Quarter Window Switch
PWR/HEATED SEAT PSD
30A
Driver Seat Assembly, Passenger Seat Assembly
PWR SLDG DR
30A
Left Rear Side Door Actuator Control Module, Right Rear Side Door Actuator Control Module
PWR WDO
30A
Window Switch-Driver, Window Switch-Front Passenger
RAP RELAY
10A
Relay Block (RAP Relay)
RH HEADLP HIGH
10A
Headlamp High Beam-Right
RH HEADLP LOW
10A
Headlamp Low Beam-Right
RR HVAC/TEMP CONT
25A
Air Temperature Actuator-Auxiliary, Blower Motor-Auxiliary, Blower Motor Relay-Auxiliary, HVAC Control Assembly-Auxiliary, Mode Actuator-Auxiliary
RR DEFOG/ HTD MIRROR
30A
Window Defogger Relay-Rear
RR FOG LP
10A
Fog Lamp Relay-Rear
RR PWR SCKT
20A
Auxiliary Power Outlet-Rear
RH T/LP
10A
Tail Lamp-Right, Trailer Rear Wiring Harness
RR WPR/WSHR
20A
Window Wiper Motor-Rear, Rear Window Wiper/Washer and Multifunction Switch
SIR
15A
Inflatable Restraint Sensing and Diagnostic Module (SDM)
STOP LAMP
15A
Stop Lamp Switch
SWC BACKLIGHT
2A
Steering Wheel Controls-Left, Right
T/SIG
10A
Turn Signal Switch and Backup Lamp Relay

Check the power window circuit breaker. Does it get hot to the touch? If so, it may trip till it cools off. Check for voltage at circuit breaker, probably goes hot with the key on. It gets voltage from ignition switch. Just to add, the fuse for the blower motor also gets ignition feed, goes hot with the key on. Whether everything is related, I don't know?

It looks like the power windows are on a 30amp circuit breaker and the blower is on a 30amp fuse. Both are powered thru the key switch so if those circuits have no power it could be the key switch.

The heater is NOT actuated by a fuse, the fan is. ]But if the fan blows, the electrical part is OK, then it must be the heater door that switches from the cold air to the hot one, or 2) the heater core is not receiving enough hot coolant.

if the lower fan speeds dont work but the fastest speed does the heater fan resistor block needs replacing. If the highest fan speed doesnt work leave it on there and check for power at heater blower fan, if power is on one wire and the other is an earth the blower motor fan needs replacing. Use a normal globe test light to check this. If no power on any wires to fan go back and check all fuses in car and under bonnet with same test light. If fuses are ok possible open circuit wire to fan.

Power is supplied to the Power windows and sunroof through the power window circuit breaker. That circuit breaker is supplied power through the RAP (retained accessory power) Relay, the RAP relay also supplies power to the radio. The RAP relay is also fuse protected by the RAP fuse in the under hood fuse block. The RAP relay is energized by the BCM body control module.

The RAP relay is responsible for the radio and windows working after the igntion is turned off.

The first place to check would be the RAP fuse in the under hood fuse block and then the RAP relay in the Body fuse block.

A list of the BODY relay block located on the left side of the dash to the right of the interior fuse block is below:

(1) Park Lamp Relay (2) Courtesy Lamp Relay (3) Retained Accessory Power (RAP) Relay (4) Power Seats Circuit Breaker (5) Power Windows Circuit Breaker (6) Inadvertent Power Relay (7) Door Lock Relay (8) Headlamp Ground Relay (9) Driver Door Unlock Relay (10) Door Unlock Relay(1) Park Lamp Relay
(2) Courtesy Lamp Relay
(3) Retained Accessory Power (RAP) Relay
(4) Power Seats Circuit Breaker
(5) Power Windows Circuit Breaker
(6) Inadvertent Power Relay
(7) Door Lock Relay
(8) Headlamp Ground Relay
(9) Driver Door Unlock Relay
(10) Door Unlock Relay
(1) Park Lamp Relay (2) Courtesy Lamp Relay (3) Retained Accessory Power (RAP) Relay (4) Power Seats Circuit Breaker (5) Power Windows Circuit Breaker (6) Inadvertent Power Relay (7) Door Lock Relay (8) Headlamp Ground Relay (9) Driver Door Unlock Relay (10) Door Unlock Relay (1) Park Lamp Relay (2) Courtesy Lamp Relay (3) Retained Accessory Power (RAP) Relay (4) Power Seats Circuit Breaker (5) Power Windows Circuit Breaker (6) Inadvertent Power Relay (7) Door Lock Relay (8) Headlamp Ground Relay (9) Driver Door Unlock Relay (10) Door Unlock Relay

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

The fuse wil be clearly marked as blower, same blower for a/c and vent. For motor, call a reputable used parts house

Cavity
1 20 amp yellow hazard flashers
2 10 amp red heated mirrors
3 20 amp yellow body lights
4 not used
5 20 amp yellow windshield wipers
6 20 amp yellow turn signal lights
7 10 amp red radio
8 not used
9 7.5 amp violet illumination lights
10 2 amp pink left tail lights
11 2 amp right tail lights
12 not used
13 20 amp yellow rear window wiper/washer
14 2 amp pink speed control
15 10 amp red gauges, warning lights
16 not used
17 10 amp red left low beam headlight
18 10 amp red right low beam headlight
19 20 amp yellow stop lights
20 20 amp yellow rear a/c heat
21 20 amp yellow fog lights
22 20 amp yellow park lights
23 20 amp yellow battery
24 20 amp yellow back up lights
25 circuit breaker power windows,power vent windows
26 30 amp lt. green a/c heater blower motor
27 circuit breaker power door locks
28 not used

You checked the DRVMDL fuse in the rear fuse box ? The rear fuse box under the back seat. Also the PWR WDO circuit breaker in the rear fuse box.

Power Windows Inoperative - All
Step
Action
Value(s)
Yes
No
DEFINITION: All power windows inoperative from all door window switches.
1
Was the Power Door System Diagnostic System Check performed?
--
YES - Go to Step 2
NO - Go to Diagnostic System Check - Power Door Systems
2
Remove the PWR WDO circuit breaker.
Using a DMM, measure the resistance between circuit breaker terminals.
Is the resistance within the specified range?
0-5 ohms
YES - Go to Step 4
NO - Go to Step 3
3
Replace the PWR WDO circuit breaker.
YES - Is the replacement complete?
--
NO - Go to Diagnostic System Check - Power Door Systems
--
4
Using a DMM, measure the voltage between both rear junction block PWR WDO circuit breaker #57 terminals and ground.
Is the voltage within the specified range for either measurement?
10-15 V
YES - Go to Step 5
NO - Go to Power Distribution Schematics .
5
Repair CKT 1040 for an open or high resistance at rear junction block.
Refer to Wiring Repairs in Wiring Systems.
Is the repair complete?
--
Go to Diagnostic System Check - Power Door Systems

bad ground on battery to engine block,use jumper cable from negative to a metal bracket on engine and see if that resolves issue if so get a new ground cable.