Door lock troubleshooting (again)
 

Ok, I have a couple of days off starting on Thursday so I want to fix an issue with the 83 300D. The locks! Everything else vacuum operated works ok (Engine Shutoff, brakes, transmission ) So, where would be a good place to start and a logical progression?

I have read most of the troubleshooting posts and I have the vacuum diagrams and a decent hand held vacuum pump, I just need some input on where to start eliminating stuff.

Thanks.

Glenn

I would pull the carpets and then look under the plastic cover running down the outside of the footwell. All the vac lines for the door locks are there. Thats usually where I start troubleshooting the door lock vac. You'll find two 3 way connectors, one unlock(yellow/green) and one lock(yellow/red). Here is where each line goes for both sets of lines.
1. Master door lock switch in the drivers door
2. Driver's rear actuator.
3. Passenger side and trunk.

On the passenger's side under the same plastic cover you'll find two 4 way connectors. Here is where the lines goes.
1. Vac coming from the driver's side
2. Passenger front door.
3. Passenger rear door.
4. Trunk and fuel door lock.

Here are a couple pics of the lines in the footwells.
1. Driver's side.
2. Passenger side.

Test each line by pulling vac on it, and work your way through the system This will tell you which actuators are leaking. Test both the lock and unlock systems. As one side can leak and the other won't.

hand pumps suck! get a motorized one!

Mr. Lazy I see:P

I've been using my hand pump mity vac for years. The only time it's a bear is when I've used it to test the vac reservoir. Other wise a few pumps tells me what I need to know.

MityVac's can be cheeeep ... if your patient .. on ebay

I was patient.