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you can not play dvd's when the car is not in park with the e brake on. I"m assuming it was factory installed or by a dealership??? they hook a line from it to your brake sensor. it's illegal to watch movies while you're driving. so long as theyre behind your seat and out of your view theyre legal, otherwise they hook it to your brakes.
You need to trick it into thinking you're in park. If you post the model the directions can be specific. There should be a signal line from your head unit to connect to the brake. You can hook a $2 toggle switch up under the dashboard, or hook up an auto relay between the head unit power line and brake signal line.
The yellow/blue wire out the back of the head unit needs to be hooked up to the same wire that is responsible for illuminating the "BRAKE" light on your dash. This tells the DVD player that the car is not in motion. Where this wire is and how to tap into it is entirely dependent on what kind of car you have. You may need to trace the wire out or consult a wiring diagram.
If you wish to bypass this feature (which may be illegal in some states) try this:
** Insert a DVD ** Let it play until you hear sound ** Press STOP twice on remote ** Enter 26604 ** Press ENTER
If you were using RCA cables, you may have had them hooked up wrong. I know this may sound like an easy fix, but I still hook them up wrong from time to time. Especially if there are more than one set of RCA hook-ups on the back of the unit. If you were using a S-video cable you shouldn't have to use RCA cables, if you had both hooked up that could cause your DVD/VCR unit to not work properly and only get a partial feed to the TV. I hope this helps a little. Good luck.
If the DVD works with a picture and sound then it is not a hook up problem.. Its the VCR tape heads need cleaning so follow the insert im attaching here.
CLEANING THE VIDEO HEADS - in the event of a head clog, the first thing professionals try to accomplish on a cleaning job is to restore the picture. Cleaning the video heads is the most critical part of the process. Use extreme caution. Never use cotton swabs. Cotton tends to grab, get caught or leave fibers in the heads. It can also break them. Using chamois sticks is by far the safest method.
Soak a chamois stick with head cleaning fluid and place it directly on a video head with light pressure. For beginners, the safest method involves holding the chamois stick stationary in one hand and rotating the drum clockwise with the other. You want all scrubbing action to be in a horizontal direction. Never use any vertical motion; it's very risky for head tip breakage. When finished, allow a minute or two for the heads to dry and your ready to try it out.
Pop in a tape and press PLAY. Confirm the picture is now clear. If not, you might want to repeat the above process once again. Ninety eight percent of the time, cleaning the video heads solves this symptom. Most of the remaining two percent is caused by a defective video head somewhere on the upper drum. Hope this helps
Ps Dont forget to rate this.