TROUBLE SHOOTING
Note. See TROUBLE SHOOTING - BASIC PROCEDURES article in GENERAL TROUBLE SHOOTING section.
ON-VEHICLE TESTING
| CAUTION | When battery is disconnected, vehicle computer and memory systems may lose memory data. Driveability problems may exist until computer systems have completed a relearn cycle. See COMPUTER RELEARN PROCEDURES article in GENERAL INFORMATION before disconnecting battery. |
GENERAL INSPECTION
Ensure battery posts and cables are clean and tight. Check drive belt tension. Ensure connections at generator, regulator and engine ground are clean and tight. Check fuses and fusible links, replace as necessary.
Check condition of battery to see if battery has the ability to accept and hold a charge. If battery capacity meets requirements, charge battery before proceeding with testing to ensure battery is fully charged.
NO-LOAD TEST
- Connect voltmeter positive lead to B+ terminal on generator and negative lead to ground. Start and run engine at 1500 RPM with no electrical load (foot off brake and doors closed). Read voltmeter when voltage stabilizes. This may require waiting a few minutes. Voltage should be 13-15 volts.
- If voltage increases to proper level, proceed to LOAD TEST. If voltage increases beyond proper level, proceed to OVERCHARGE CONDITION. If there is no voltage increase, proceed to LOW OR NO CHARGE CONDITION.
Scheme 2
LOAD TEST
- Ensure drive belt is in good condition and properly tightened. Connect charging system load tester in accordance with manufacturer's instructions. Start and run engine at 2000 RPM and apply load until generator output amperage levels off.
- Record maximum generator amperage output. See GENERATOR OUTPUT SPECIFICATIONS table for output values. If generator output is within 20 percent of rated output amperage and voltage remains at 12.5-14.5 volts, generator output is okay. If generator does not produce rated output, proceed with appropriate testing.
| Application | Amps Rating |
|---|---|
| Contour & Mystique | 95 |
GENERATOR OUTPUT SPECIFICATIONS
"S" & "I" CIRCUIT TEST
- Unplug regulator 3-wire harness connector. Connect jumper wire from harness "A" terminal to regulator "A" terminal. (Scheme 2)and (Scheme 3). Connect another jumper wire from regulator "F" terminal screw to generator housing.
- With engine idling, connect voltmeter negative lead to battery ground terminal. Connect voltmeter positive lead first to "S" terminal and then to "I" terminal of regulator harness connector. (Scheme 3) Voltage at "S" terminal should be about 7 volts and about 14 volts at "I" terminal. If "S" terminal and "I" voltages are okay, replace voltage regulator. Repeat LOAD TEST. If "S" and "I" circuit voltages are not as specified, go to next step.
- If voltage is present at "S" terminal, but not 6-8 volts, replace generator. If no voltage is present at "S" terminal, disconnect one-wire connector ("S" terminal) on back of generator. Check voltage at single "S" terminal. If about 7 volts are present, repair "S" circuit wiring. If no voltage is present at single "S" terminal, replace generator.
- If no voltage is present at "I" terminal, repair indicator light wiring circuit. Restore wiring connections and repeat LOAD TEST.
