1999 Q45t Cruise problem after heavy rain.

[1999 Q]

I searched for this and found 1 post that was unanswered that described my problem exactly.Just after a heavy rain storm all of the sudden I experienced the trac light, suspension light, CEL, and ABS light all flashing intermittently. I lost all ability to accelerate and had to pull off the highway. After doing the cursory look under the hood i decided to get under way again. No Problems for 65 miles then the same thing.I had been using the cruise so decided to eliminate that as an issue and made the next 300 miles of the trip without incident.Any ideas?

[qship96]

Logical thing to do is to read the codes stored in ECU.

[1999 Q]

No codes present. That was my first step.

[paranoidjack]

No codes present. That was my first step.

Lights coming on in the rain isn't a sign of a mechanical problem - it's clearly an electrical issue.

Some say (I've never had it), that the TRAC OFF and ABS lights come on when there is an issue with the charging system (alternator, battery).

I would first suggest having the battery properly load tested and also the alternator at a place with the correct hardware.

My guess is you have a portion of the wire harness that is just shorting out with the rain. Get under the car with a flashlight and look.

edit: Still have your plastic splash guard under the car? Always amazes me how many people don't have those anymore (typically those that get oil changes at 10 min oil joints)