Installed bat. Isolator, now truck wont start

[hidesertwheelin]

HELP!!!!!! I installed my battery isolator tonight and my truck won't start. All it does is crank. None of the lights or anything else works. This is the isolator
I used

I instlled it per the directions except for the circuit breaker between the aux. battery and the isolator.

 

[Corey 78K5]

Sounds like you should have used the circuit breaker. Now check all your fuses.