Problem with keyless entry on'94 Z28 Camaro

Hi all,
I've got a problem with the remote entry on my Camaro.
I had it detailed a while ago & the guy decided he to wash the motor with a high pressure washer, which caused all sorts of problems with the motor & cost me a heap of cash to fix it. Anyway, thats all fixed, but ever since the remote entry controls do not work. I've tried new batteries in the remotes, but still nothing works.
I've checked the keyless entry notes, but the posts are more about programming the remotes.
Does anyone have any ideas ?

Thanks guys