My car was in a flood about three months ago, while other parts of the car have came back my radio has not. I am trying to figure out how I can test the radio with a broken knob

Sounds like the issue is with the starter solinoid.

check the wire that runs from battery to the starter. take it off of starter and clean with wire brush or sandpaper put back on. if that is not the problem my next move would be to have starter tested. u can take it to auto parts store to get it tested

Hello,

Find a large open parking lot and then do tight figure "8's" with the steering wheel all the way over locked and then listen for noises from the front wheel area with your windows down and the RADIO OFF! When doing figure 8's with the steering wheel hard over each way when your doing the figure 8 pattern will bring out the bad CV joints and they will make lots of noise. Best to get a second quote from a front end shop and compare prices. You could call a local auto parts store and ask what the CV joint and shafts cost to get an idea on the parts prices. Good luck and road test that car in a large parking lot with room to do the figure 8 pattern. Dennis

You have ONE Option ONLY

The thing you needed months ago

A WIRING DIAGRAM

Until you learn how to read a wiring diagram
& can logically figure out exactly the only thing
that could cause such a problem,you can't even
start any on vehicle examination or testing to correct
things

U seem to have developed a short once cars are in floods the are a problem from then on try a test light at the fuses and see if you cam trace down were the short is it will be aslow thing to do but if you can do it it will sabe you monies take out a fuse put a test light from side to side hold liteon one side of fuse terminal and move thewire harness for that fuse if there is short then bulb will lite up

Stop by any good parts store (Autozone, Advance, etc..) and have them test your charging system and load test your battery. I think you'll find your answer between those two tests.

just call an auto parts store and see if they will give a readout or instructions to replace alternater. or the dealer may do this for free also. good luck, carl

Have you tried jump starting it? Low voltage can cause lots of issues. It could be a bad alternator.

yes it very well can be however it can be a defective starter. the way you test is you need a test light and a proper ground to the vehicle and test the wire going to the starter! first off make sure no wires are loose on the starter

Your light problem will be a broken or damaged wire, most likely under the van at the back. Use a test light and test the wire from back to front until you find power/
The AC probably just needs recharging, or the rad could be partly plugged.
The radio... not sure. Try and find another one at an auto wrecker, and see if that solves it. They really aren't worth fixing anymore.