My G/F's 2013 GMC Terrain SLT started out life with a balky NAV system. It was replaced until it was good again, but recently, she's been having problems starting the car.
I posted this in the old thread I had started (here: http://www.terrainforum.net/index.php?topic=6861.20
), but at its heart, it IS an electrical problem....
So, here we are, almost three-and-a-half years later, and her electrical system is going screwy again.
We thought it was the battery at first, but it's weirder.
Sometimes the car starts (MOST of the time it starts), but sometimes it wont. She gets the expected clicking from the engine compartment, and sometimes the whir of the starter motor and engine turning, but not ignition; the engine won't start.
The lights all seem to be the proper brightness, though. And the Nav system lights up, and the headlights come on. The battery warning light (since there's no volt-meter) flashes as it should when I turn the key, but then goes dark, indicating all is good.
We tried this four or five times, with similar--bad--results. I opened the hood and looked at the fuses. Various relay clicks from the fuse box...but I'm not a "fuse whisperer," so I don't know the language.
The sixth time, the relays clicked, the starter clicked and whirred, and the engine caught and fired up. FINALLY! The radio came on, the NAV display was lit and looked normal, BUT....
We noticed two immediate problems. The heating system would NOT turn on (nothing at all--not even the heated seats. No on lights, no response on the NAV screen; it was as if that whole section had been...unplugged. That's why I'm thinking "electrical issue," rather than "battery.'). And the clock in the NAV system was wrong. We drove the ~10 minutes to get home.
I turned the car off, and then fired it up again--no problem. Started right away. AND the heating system worked fine. I didn't look at the clock (I'm too tall--it's under the "awning"), but I'm going to assume that it will be wrong until I set it right.
I want to be able to convince myself that it's just the battery. That would be easy to fix. But my gut is telling me it's something more.
One last "clue": My girlfriend says that the car tends to give her this sort of trouble mostly after she's run the radio for 10 minutes or more with the key in the "Accessory" position. If the battery is bad, this would make some sense. But the car, and the battery, aren't even 4 years old at this point. And I recall my dad's ancient Plymouth Duster, which would blow an engine resistor every time he did the same thing with the radio (Yes, I know: a different time, a different manufacturer. But a much SIMPLER electrical system) so, at least, it's possible that the GMC doesn't like playing the radio without the engine on.
Any ideas, anyone??
Thanks in advance.