Low coolant light problem 93 cutlass

[mchill07]

I have a problem with the low coolant light, it flashes.

I replace the sensor with one i found on a junk car and still had the

Same problem so I bought a new one at a parts store and

It too had the same problem. This leads me to believe there is a

Problem somewhere else. The light flashes every 3 seconds similar

To the service engine soon light when a misfire is detected.

If I unplug the sensor the light goes out. It bugs me that there is

Something worng with it.

[RobertISaar]

kinda sounds like the cluster is the issue.

[mchill07]

If that's so... I already need to replace the cluster.

The trip odometer doesn't work and the needles are

faded. It's difficult to find one for a 3.4 under 100,000 mi.

Thanks for the advice!

[kevin polinski]

I agree that you're probably looking at a problem with the cluster. Specifically the printed circuit. The timed flash is a key. The cluster circuit receives power from the 10 amp indicator fuse. it powers the ABS indicator, the brake indicator, the service engine soon indicator, the upshift indicator (manual trans), the low oil indicator, and the low coolant indicator. Voltage is fed along the printed circuit, through the bulb, and to the coolant switch along the yellow/black wire. When the coolant level is OK, the switch is open and no current flows, thus no illuminated bulb. When the coolant level is low, the switch closes and grounds the voltage through the black/white wire, thus completing the circuit and illuminating the bulb.

Since your light flashes, I think you may be grounding the circuit through one of the other strips on the printed circuit on the back of the cluster (probably the service engine soon).

All of this assuming the basics are covered. Coolant level OK. All the other indicators working properly. No chopped up wiring. No trouble codes.