How do you bypass the parking brake for an after-market in-dash DVD player?

For the record, bypassing the parking brake switch for aftermarket in-dash DVD is illegal (in the U.S., which is why it is generally easy to bypass them, considering its not illegal in the countries where they are manufactured). However, there are instances that it is necessary. Using an in-dash DVD stereo in the back of a lemo for example, in which case the law doesn't apply. Or just your average Joe who wants his wife to be able to watch a DVD while he's driving without spending another couple hundred bucks to put a screen in her headrest. Its a pretty stupid law obviously, but what do you expect when certain types of people are watching porn and blaring their radio sitting in traffic. Anyone worth living would know not to watch it while in the middle of driving. The E-Brake is just annoying.

The majority of aftermarket units rely on a grounding switch, otherwise known as the "e-brake switch". On the back on the unit there should be an additional wire labeled as the "Parking Brake" or something to that effect. Law implies that this should be spliced into the Parking Brake wire (which is essentially a constant hot which becomes a ground when engaged). So the obvious thing here is to simply ground the Parking Brake wire on the back of the radio. This can be done just splicing it into the black wire on the radio harness.

However, some units use different methods. Some require seeing a pulse (i.e., power-ground-power-ground-etc.), resulting in the annoying need of pushing the e-brake a few times before your video will pop up. This can generally be recreated by using a 3-prong switch (you can get one at AutoZone). Connect it backwards -- the ground to power, power to ground, and the "Load" to the Parking Brake wire on the back of the radio. Flip the switch back and forth a few times and sometimes the video will pop up.

Some fancier units cannot be cheated. They use an internal gyro mechanism that detects movement.

Some even feature bypass codes. By pressing a certain combination of buttons on the remote then entering in a code it will permanently allow video.

Be good.

Dual DVD

Play Dvd for few seconds until you hear sound

Press Stop Twice

Then enter on remote 26604 the press enter

Enjoy