2006 Nissan Pathfinder

Should the battery & brake light blink when a vehicle is overheating?

I had the A/C on and was waiting in a big line of traffic when I noticed that the coolant temperature gauge was rising. The funny thing is that the Battery and Brake light also turned on. Immediately, I turn on the heater to prevent damage as it would act as a 2nd radiator until I got home.

A few months ago I had the Alternator, Serpentine Belt, & Heater Core replaced. Something tells me its the Water Pump or A/C Compressor that will need replacement. I did an OBDII scan and there are no coolant related codes.

A mechanic will do a Coolant Pressure Test on Wednesday, but I don't see any coolant lost and the oil looks good.