Everything is screwing up..Please help

[drink2mny]

Here's the story.
A buddy has an '84 chevy shortbed 4x4.
He asked me to check his heater because defrost didn't work..
Well he gave me the keys and I went to figure it out for him.
come to find out the resistor??I think thats what its called is bad. His heater fan switch only goes to the 3/4 mark, if you go to high the fan doesn't work..So I started the truck up to make sure vacuum lines worked to the heater..
Well as soon as I turned the key, the buzzer was going off and both directional lights were bright, then went off in a couple seconds.. So I didn't think about it..Ran everything through for the heater and just told him don't put the switch to high till he gets it checked by a shop or trys one i have..
now here is where it gets wierd..
He went to leave later and started up his truck and the buzzer and directional lights came on and didn't go off.
plus he went to put his wipers on because of some snow on the window and they didn't work, like they did earlier in the morning.
plus all his gages drop heater, fuel, oil,alt..
well the buzzer finally went off with the directional lights, but as soon as you try the wipers everything happened again all gages did the same thing plus the directional lights came on..
shut off the wiper switch which you know is on the turn signal handle and pushed the handle so the left directional would come on and all the gages dropped in unison with the blinker coming on, same thing if you put it to the right..

Any thoughts about what gremlin is doing this please help...
I feel bad, but I know and he knows I didn't touch anything but the heater..

Oh yeah I asked if it was a stock column because I have never seen a key release button/handle on a chevy truck.. I owned an '84 and didn't have that, plus my blazer and a buddies 87 don't have them. Just turn the key and pull it out.. no seperate hadle to push down..Anyone else have taht or is his column out of something else???


Whew No I need a drink