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Discussion Starter #1
I searched all the threads regarding the little light. But none seem to point to what is going on with my light. The light turns on at different times. It's been on with a full tank of gas, a correct oil level, a correct water/coolant level, a normal temperature, etc. Sometimes when accelerating on the freeway it comes on, when making a right turn it turns on. It doesn't happen all the time, but those are just some of the ocassions it has taken place. I hate to be driving and then see a red light turn on. I've paid attention to the oil pressure gauge and it does not move.... stays past the M. Any ideas, other gauges to check, things to replace, etc?
 

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Take it somewhere and get the codes checked. 'Definitely more efficient that a hit-or-miss approach to replacing parts on a hunch...

EDIT: Oops - I thought it was a check engine light, not check gauges light, which I don't believe throws a code...
 

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Usually the check gauges light only comes on, when one of the gauges is out of it's normal range. I'd check to make sure they are all in their normal range when the light comes on. Then check for shorts.
 

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See if this helps any. It's the Pinpoint Test from the 1995 Service Manual:

PINPOINT TEST E: CHECK GAUGE INDICATOR ALWAYS/NEVER ON

E1 CHECK ADDITIONAL INPUTS
Check operation of fuel gauge, engine coolant gauge or indicator and oil pressure gauge or indicator.

Do all listed devices operate correctly?
Yes
GO to E2.

No
REFER to Symptom Chart for appropriate pinpoint test(s).


E2 CHECK "CHECK GAUGE" OPERATION, OIL PRESSURE CIRCUIT CLOSED
Disconnect oil pressure switch.
Connect oil pressure switch circuit to ground with a jumper.
Turn ignition switch on.

Does "CHECK GAUGE" indicator light?
Yes
GO to E8 .

No
GO to E3 .


E3 CHECK "CHECK GAUGE" OPERATION, OIL PRESSURE CIRCUIT OPEN
Remove jumper installed in previous step.

Does "CHECK GAUGE" indicator light?
Yes
TURN ignition OFF. RECONNECT oil switch. GO to E4 .

No
GO to E9 .


E4 CHECK FUEL LEVEL SENSOR CIRCUIT, NORMAL FUEL LEVEL SIMULATED
Disconnect fuel pump module harness connector.
Install Rotunda Instrument Gauge System Tester, Part Number 021-00055, or equivalent between Circuit 29 (Y/W) and a known good ground.
Set tester resistance to 56 ohms.
Turn ignition switch ON.

Does "CHECK GAUGE" indicator light?
Yes
GO to E8.

No
GO to E5.


E5 CHECK FUEL LEVEL CIRCUIT, LOW FUEL LEVEL SIMULATED
Reduce tester resistance to 18 ohms.

Does "CHECK GAUGE" indicator light?
Yes
TURN ignition OFF. RECONNECT fuel pump module. GO to E6.

No
GO to E9.


E6 CHECK ENGINE TEMPERATURE SENSOR CIRCUIT, NORMAL TEMPERATURE SIMULATED
Disconnect water temperature indicator sender unit harness connector.
Install Rotunda Instrument Gauge System Tester, Part Number 021-00055 or equivalent, between water temperature indicator sender unit circuit and ground.
Set tester resistance to 15 ohms.
Turn ignition ON.

Does "CHECK GAUGE" indicator light?
Yes
GO to E8 .

No
GO TO E7 .


E7 CHECK ENGINE TEMPERATURE SENSOR CIRCUIT, HIGH TEMPERATURE SIMULATED
Reduce tester resistance to 10 ohms.

Does "CHECK GAUGE" indicator light?
Yes
"CHECK GAUGE" indicator operating correctly. ADVISE customer.

No
GO to E9.


E8 CHECK FLEX CIRCUIT SIGNAL TRACES CONTINUITY
Remove instrument cluster.
Disconnect harness connectors.
Remove check gauge warning light module from back of cluster.
Measure resistance between instrument cluster harness connector pins and check gauge warning light module connector pins for all circuits.

Is resistance 0.5 ohm or less?
Yes
GO to E9.

No
REPLACE flex circuit. RESTORE vehicle. RETEST system.


E9 CHECK FLEX CIRCUIT TRACES FOR SHORT CIRCUITS
Measure resistance between all check gauge warning light module connector pins on back of cluster.

Is resistance 100 ohms or more?
Yes
REPLACE check gauge warning light module. RESTORE vehicle. RETEST system.

No
REPLACE flex circuit. RESTORE vehicle. RETEST system.
 
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