Dash lights 4WD low and 4WD high flash six times and then go off?

DMKEENER

MEMBER
2000 MERCURY MOUNTAINEER

I own a 2000 Mercury Mountaineer, 4WD, 6 cyl, with 84,000 miles on it.
Within the last week, the dash lights 4WD low and 4WD high flash six times and then go off. Sometimes this process repeats itself once or twice in a half hour period. After that they normally do not flash again until the engine has been shut off and restarted. It does not do this every time. I called the dealer and they said there was a 50%chance that they could diagnose the problem but that if the lights were not on when I took it in, it was less % than that. I could not find anything in the owners manual about the lights flashing and then going off only if the lights stayed on.
Any ideas on what I might do.

1 Reply

SQM

MECHANIC
6,383 POSTS

Hello,

You likely have an intermittent issue with the transfer case control module.
The best way to know what is the exact issue it will need to have the vehicle scan for codes. But it may not produce any fault codes if the issue is not surfaced at the time of the diagnostics.

This can also be triggered by the relays for the transfer case. Those relays are located under the dash on the passenger side.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please let me know of any questions.
Thank you.

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