2002 Chevy Blazer LS

I just installed an Alpine SEC-150R Alarm in my Blazer.  Everything seems to work fine except now my headlights don't work properly and I don't have a working "parking light flash" response when I arm/disarm the alarm.  The headlights turn on but the the drivers LOW beam is the only one that illuminates properly, the rest are just really dim, and all four bulbs come on at once.  The marker lights and bumper lights do not work, except when signalling or hazards are on, then the bumper lights work accordingly........  I am confused..... I have checked all my grounds, they all seem to be good.  Thinking maybe i hooked up a relay wire wrong somewhere....????

Any thought or suggestions are greatly appreciated!!!!

Where did you hook it in at?

Are you sure there is NO Broken Bulbs or shorted wires on Front?

I Replaced with all brand new bulbs, and just tonight I pulled all the wire loom off the headlight wires and all wires are visually fine.  have not used a DMM on the wires yet... 

I really appreciate the help mo12v!!! 

I'm gonna go DMM the wires....  Any other suggestions are appreciated....  :)

1 Your Battery, is it up & will vehicle Start?

2 Does you lights work if you Unhook wire from Alpine?

I just got done removing my dash panels. I found the "park light Flash" wire was pinched and I fixed this.  Now the park lights and marker lights come on appropriately with the headlight switch, but still do not flash with the Arm/Disarm function.  Also all bulbs are very dim, except the Driver's Low beam which comes on full power.

1- The vehicle starts just fine, "pops" right off... 

2- No, the lights do not change even with the wire from the alpine disconnected