Car Radio, what is wrong???

[Lukus]

This is really pi$$ing me off now.

Got an 03 combo van. Stock radio would light up but screen was smashed and couldn't get it to play anything.

Bought an aftermarket radio. Swapped them over without a problem, or so I thought.
It worked fine, until the van started moving then it would cut out. When I drive along the motorway, it would randomly turn on and then off again as soon as I come to a stop

Now the radio doesn't even turn on. I've checked every single fused I could find, plus more after checking Google. They are fine.
I have used a multi reader (Set on V- 200 and 20), first time it was telling me I had power (12v) coming through the harness. Ignition on and off. Now I'm getting nothing. All my reader shows is -0.00, if I'm lucky I'll get 0.03.
Again I've checked all fuses.

Everything I'm checking on my reader, it's always 0.00 or -0.00.
Tried a brand new AA battery, I'm getting 0.00

Help please!

 

[ruston]

Either you have a bad or wrong connection or the ECU is rejecting the canbus signal.

 

[littlespark]

car radios normally have two 12v+ feeds. One through the ignition to power the radio, and one on permanently to keep any memory powered.

 

[static zap]

Mechanical intermittent.
May have disturbed it a few times so getting worst !
Re-check fuse holders is any labelled.
--Some fuses can be prodded for 12V in place --
Is does van have a Round power-point(X-faglighter)
Has it got power with ignition in AUX ?
(have no experience of 03 combos -habits/fittings)