Just bought a 2010 HHR panel van. The rear hatch door won't lock?? Any suggestions?

 

Welcome to the site, lubricate the mechanism, check for loose or broken wires.

 

Make sure there is NO fuse in position #11 under hood fuse box.

 

Hi ldellington, to the forums!

In the underhood fuse block, check that fuse #10 is good, and that there is no fuse in #11.

 

What circuit is completed IF a fuse is in #11 ? Thanks.

 

From the TSB and recall list:

#PIC5055: Rear Hatch Will NOT Lock - keywords door fuse gate latch lift liftgate lock pad release RKE touch UBEC unlock - (Dec 11, 2008)


Subject: Rear Hatch Will NOT Lock


Models: 2006-2009 Chevrolet HHR

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The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.

Condition/Concern:
The customer will notice that at anytime by using the touch pad on the rear lift gate the lift gate will open WITHOUT unlocking the vehicle.

Recommendation/Instructions:
If this condition exists, check for a fuse in position #11 in the Underhood Buss Electrical Center. If there is a fuse in that position, remove it, as it is not supposed to be there.

Note: A fuse in that position will cause the release relay (coil side) to stay powered up at all times and will only need a ground (touch pad) to activate the relay.

If no fuse is present then check for voltage on circuit #1221 (WH/BK) and proceed with diagnostics.

 

Thanks for that info.
Just a thought. Could using #11 be of a benefit at sometime ?

 

I can’t think of an advantage to a fuse in #11

 

It took me an hour but I figured out why it is there. I always assumed the Cobalt shared the fuse box, but no.

On a Pontiac Solstice which uses the same UBEC fuse # 11 is a totally useless thing tha powers the coil side of the trunk relay.

HHR

HHR liftgate release circuit

Solstice

Solstice trunk release circuit
Here are the complete schematics in pdf Attachment 47663Attachment 47664