went out today and bought new tires. must say van is driving and riding better than ever. OK we stopped after leaving tire store for lunch when we can out the radio went out. Put the van in park or N radio works put it in D goes quiet. OK tell me how to fix it thanks ahead of time I know you guys are a lot smarter than me by the way 1999 E-150 5.4 factory radio

 

We don't know at this point if the radio is not getting power or if the connections to the speakers could contain the problem. Once we have that info we go from there.

The alternate consideration might be to undo all you did before the radio problem surfaced and do the steps one at a time until you come across the step that causes the radio to work as it is working now. Not sure if giving the lunch back will help that much.

 

yes radio has power when you get in and start car radio will come on as long as the van is in park or N when you put it in D the radio stops working did not do anything had 4 new tires put on it worked when we left tire shop came out of place we stopped to eat and radio had problems someone said could be neutral saftey switch TRS

 

I would think if it were te MLPS you would have more problems than just the radio.
We need to confirm your theory that the power is lost by actually measuring it or if you can see the display disappear. Is that the case?
It may just be coincidence that the radio problem surfaced at this time and not be related to anything that was done. So far, has anything or any other function been affected that you might have noticed ? Not knowing the entire history we could be here all day coming up with theories. Other than tracing back from the radio to it's voltage supply point everything is up for grabs including it's ground connection.

 

expert got back to me today said to replace the Neutral Safety Switch and will fix it has seen many of these I don't know but a $25 part going to give it a shot can always use a new one anyway will not hurt

 

Power Windows?

 

yes power windows worked all the time

 

The only MLPS that I had replaced for alike issue was in a mini van.
With its symtoms, the radio, P/W’s and such would drop out when placed in Reverse, but worked in Drive.. By design, during a start, the accessories are canceled out as a power saving/protection feature for cranking the engine. But not actually done through the MLPS. Being only your radio is affected, or at all, would be a good one.

 

was going to get up yesterday and take to shop went out to start the van boom everything working great radio working great went on down to mechanic and he said not broke we will not worry about it until it does it again