Will not start

RJINFLORIDA

MEMBER
2006 BUICK RENDEZVOUS
3.6L
6 CYL
4WD
AUTOMATIC
140,000 MILES

The battery is fully charged, however it won’t start. It clicks for about 8 seconds in the off position after attempting to start it. The dash seems to be blinking as well. It has been sitting for about 6 month with this problem. I’m going to look at the BCM harness now to confirm that that isn’t the problem, as well as corrosion on the internal posts.

Thursday, November 21st, 2019 AT 8:33 AM

1 Reply

STEVE W.

MECHANIC
14,187 POSTS

The description sounds like corrosion at either the terminals or the connections for the cables. The clicking points to a lack of amperage through them. The 8 seconds is due to the way the starting system works on that vehicle. When you turn the key to the start position it initiates a timer in the PCM that turns on the starter relay for that time. Normally the engine will start faster than that time and once the PCM senses the rpm rise it shuts off the relay.
However, how do you know the battery is fully charged? Was it load tested for voltage and amperage output? I don't think the issue is in the harness however, that isn't a common failure point on them.

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Thursday, November 21st, 2019 AT 9:08 AM