02 Chevy Prizm engine stalls when headlights are turned on. headlights inop

Most cars the flasher relays are up under the dash not far from the steering column. I had several makes of cars and they all were up there.

Turn Signal Lamps
The turn signal lamps are made up of the front park/turn signal lamps and rear turn signal lamps. The front turn signal lamps flash with the rear turn signal lamps when a turn is initiated using the turn signal/multifunction lever. The turn signals will operate only with the ignition switch in the RUN position and will not operate during hazard flasher operation.
When the ignition is turned to the RUN position, battery voltage is supplied to the TURN SIGNAL, CORN LPS Fuse. Battery voltage is then applied through the TURN SIGNAL, CORN LPS fuse circuit to the hazard warning switch. The hazard switch supplies a turn signal flasher signal to the turn signal switch. With the turn signal switch in the LH or RH position the corresponding turn signal indicator, rear turn signal, and front turn signal receive the turn signal switch signal and will flash. The front turn signals receive the turn signal switch signal from the turn signal switch via the body control module (BCM) . The front turn lamps are grounded at G101. The rear turn lamps are grounded at G301 and G302.
Turn Signal Lamps and/or Indicators Inoperative

2

1. Turn the ignition switch to the ON position.
2. Place the turn signal switch in the LH and RH on position.

Do the turn signals operate properly?
Go to Testing for Intermittent Conditions and Poor Connections yes
Go to Step 3 no

3

Are all of the turn signal lamps and indicators inoperative?
Go to Step 5 yes
Go to Step 4 no

4

Are only the turn signal indicators inoperative?
Go to Step 16 yes
Go to Step 9 no

5

Check the TURN SIGNALS CORN LPS fuse for an open.
Is the TURN SIGNALS CORN LPS fuse open?
Go to Step 25 yes
Go to Step 6 no

6

1. Disconnect the hazard switch.
2. Turn the ignition to the ON position, with the engine OFF.
3. Connect a test lamp between the ignition positive 1 voltage circuit of the hazard switch and a good ground.

Does the test lamp illuminate?
Go to Step 7 yes
Go to Step 27 no

7

Connect a test lamp between the ignition 1 positive supply voltage circuit of the hazard switch and the ground circuit of the hazard switch .
Does the test lamp illuminate?
Go to Step 8 yes
Go to Step 23 no

8

1. Install a fused jumper between the ignition 1 positive voltage circuit of the hazard switch and the turn signal flasher signal circuit of the hazard switch.
2. Place the turn signal switch in the RH on position and the LH on position.

Do the turn signal lamps illuminate?
Go to Step 17 yes
Go to Step 15 no

9

Is a front turn signal inoperative?
Go to Step 10 yes
Go to Step 13 no

10

1. Turn the ignition switch to the ON position.
2. Disconnect the inoperative front turn signal lamp.
3. Connect a test lamp between the supply voltage circuit of the inoperative front turn signal lamp and a good ground.
4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?
Go to Step 14 yes
Go to Step 11 no

11

1. Disconnect the body control module (BCM) connector.
2. Connect a test lamp between ground and the front turn signal switch signal circuit of the BCM.
3. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?
Go to Step 12
Go to Step 22

12

Test for an open or for a high resistance in the supply voltage circuit of the inoperative front turn signal lamp. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 21

13

1. Turn the ignition switch to the ON position.
2. Disconnect the inoperative rear turn signal lamp.
3. Connect a test lamp between the supply voltage circuit of the inoperative turn signal lamp and a good ground.
4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?
Go to Step 14
Go to Step 28

14

Connect a test lamp between the ground circuit of the inoperative turn signal lamp and supply voltage circuit of the inoperative turn signal lamp.
Does the test lamp illuminate?
Go to Step 20
Go to Step 26

15

Test for an open or high resistance in the turn signal flasher signal circuit. Refer to Circuit Testing and Wiring Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 18

16

1. Turn OFF the ignition.
2. Disconnect the instrument panel cluster (IPC).
3. Connect a test lamp between the supply voltage circuit of the inoperative turn signal indicator and the instrument panel cluster (IPC) ground circuit.
4. Place the turn signal switch in the appropriate ON position.

Does the test lamp flash ON and OFF?
Go to Step 19
Go to Step 24

17

Inspect for poor connections at the harness connector of the hazard switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 30

18

Inspect for poor connections at the turn signal switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 29

19

Inspect for poor connections at the instrument panel cluster (IPC). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 31

20

Inspect for poor connections at the inoperative turn signal lamp. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs .
Did you find and correct the condition?
Go to Step 34
Go to Step 32

Hi Christopher:
I'd be checking to make sure that the grounds are nice and clean and working properly. When you step on the brake pedal you are activating a switch that sends power to the brake lights. The brake lights share bulbs with the signals and emergency flashers, so it is also possible that a dead short in any of those components could "steal" the power from the ignition.
At this point, it's a trouble shoot game for you to figure out what is working, and what is not.
That's part of the fun. Enjoy.

You probably have a ground issue , looking at a wiring diagram or ground distribution diagram to see if these share a commom ground point or share power from same fuse,https://www.youtube.com/watch?v=WoN1nou5t1Q&t=224s circuit with a high resistance problem . Do you know how to test automotive electrical circuits with a DMM - digital multi-meter , how to read an use a wiring diagram to pin point test spots in a circuit . Free wiring diagrams at http://www.bbbind.com/free_tsb.html . Check out these videos on voltage drop testing an basic electrical testing . This is the way to find electrical problems .
Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia YouTube
Electric Testing Techniques You Need to Know

Basic Electricity for Service Techs Ohm law Current Flow Opens Shorts

good luck !

Seems like a huge issue huh?! First have the battery checked 2. check all connections for corrosion around battery area. I'm assuming this just started? 3. if all other things check out good, have the charging system tested for no less than 13.5 volts with all accesories on. Replace the alternator as necessary. Let me know what you find and I'll be happy to continue to advise.

I think you have a bad shorted battery or bad alternator.

I had the same problem. After two days of troubleshooting I took it to my mechanic. It took him a week, tracing and thinking between other jobs, to find the solution: Running light relay module. Under the dash, not a ice cube relay, a module assembly. Part 94859202. I also has a bad ground on the jumper for the main wiring harness. $357.00 Hope this saves all of you some cash.

Does the truck have daytime driving lights ? Sounds like a short , maybe the switch inside the steering column . Turn signal , wiper , headlamp dimmer ,or multifuction switch . Without testing this is just a guess . Find a wiring diagram at http://www.bbbind.com/free_tsb.html there free , get yourself a DVOM - digital volt ohm meter an test the B+ volt into an out of the switch . moving dimmer from low to high an turning on the turn signals etc.... Suggest you watch a few videos on youtube for automotive electrical testing , how to use a wiring diagram etc.... disconnect circuits at the mutifunction switch .

Measure the resistance between multifunction switch C202a pin 44, circuit 44 (LB), harness side, and electronic flasher connector pin 1, circuit 44 (LB), harness side; and between multifunction switch C202a pin 44, circuit 44 (LB), harness side, and ground.

• Is the resistance less than 5 ohms between the multifunction switch and the electronic flasher, and greater than 10,000 ohms between the multifunction switch and ground?

Carry out the multifunction switch component test; Refer to Wiring Diagrams Cell 149 for schematic and connector information.
.

• Is the multifunction switch OK?

Yes INSTALL a new electronic flasher. TEST the system for normal operation.

No INSTALL a new multifunction switch; REFER to Section 211-05 . TEST the system for normal operation.
Testing the electrical circuits of all the system not functioning properly is how you go about finding the problem .

1. Visually inspect the following for obvious signs of mechanical and electrical damage.
   
   Visual Inspection Chart Mechanical Electrical
   • Headlamp switch
   • Multifunction switch
   • Battery junction box (BJB) fuse 3 (30A)
   • Central junction box (CJB) fuse:
     • 5 (15A)
     • 16 (20A)
     • 26 (10A)
     • 28 (10A)
   • Wiring harness
   • Loose or corroded connections
   • Headlamp relay (if equipped)
   • DRL relay No. 2 (if equipped)
   • DRL jumper (if equipped)
   • RAP module (if equipped)
   • Central security module (if equipped)
   • Light sensor amplifier (if equipped)
   • Headlamp bulb

1. If the concern is not visually evident, determine the symptom and proceed to the Symptom Chart.

Symptom Chart
NOTE: Refer to the Wiring Diagrams for connector numbers stated in the pinpoint test.
Symptom Chart Condition Possible Sources Action

• Both headlamps are inoperative

• Battery junction box (BJB) fuse 3 (30A).
• Headlamp switch.
• Circuitry.
• Multifunction switch.

• GO to Pinpoint Test A .

• The low beams are inoperative

• Central junction box (CJB).
• Circuitry.

• GO to Pinpoint Test B .

• The high beams are inoperative

• CJB fuse 16 (20A).
• Circuitry.
• CJB.
• Multifunction switch.

• GO to Pinpoint Test C .

• One low beam headlamp is inoperative

• CJB fuses:
  • 28 (10A) (LH).
  • 26 (10A) (RH).
• Headlamp bulb.
• Circuitry.

• GO to Pinpoint Test D .

• One high beam headlamp is inoperative

• Headlamp bulb.
• Circuitry.

• GO to Pinpoint Test E .

• The headlamps are on continuously

• Headlamp switch.
• Circuitry.
• Multifunction switch.
• Daytime running lamp (DRL) relay No. 2 (if equipped).
• DRL jumper (if equipped).
• Headlamp relay (if equipped).
• Remote anti-theft personality (RAP) module (if equipped).
• Central security module (if equipped)
• Light sensor amplifier (if equipped).

• GO to Pinpoint Test F .

• The high and low beam headlamp is inoperative on one side

• Circuitry.

• REPAIR circuit 57 (BK). TEST the system for normal operation.

• The flash-to-pass feature is inoperative

• Multifunction switch.

• CHECK circuit 196 (DB/OG) for an open. REPAIR if necessary. If OK, INSTALL a new multifunction switch; REFER to Section 211-05 . TEST the system for normal operation.

educated guess..flasher units (2) one for signals the other for emerg flashers usually located in fuse block under dash drivers side kick panel , glove box area ..or engine compartment near battery

Ground problem more then likely . Looking at a wiring diagram turn signals an headlamps right front share common ground G-109 . Do you know anything about automotive electrical circuit testing ? Voltage drop testing ? Watch these videos .

Mastering Voltage Drop Testing with Pete Meier and Jerry Truglia

Electric Testing Techniques You Need to Know

Free wiring diagrams at http://www.bbbind.com/free_tsb.html Enter vehicle info. year , make , model an engine size . Under system click on lighting ,then under subsystem click on headlamps .Click the search button ,then the blue links . Look at wiring diagram so you know which wire is which . Power , ground etc...
G109
In the right side of the engine compartment, near the fender well !