by 79MonzaSpyder » Mon Jul 30, 2018 6:14 pm
Hi Rob, If you hear a click at the horn I would check for 12 volts at the horn with someone pressing the horn button, or jump 12 volts straight to the horn (with the green wire off of it), or take the horn off the car and test it connected to a 12 volt car battery. GM used those horns on almost every GM for years and they do die. I have replaced my fair share of them over the years having owned many 70's and 80's GMs. My truck alone I've replaced them, (it has two, a High tone and a Low tone), at least twice over 35 years. If you want to get at all the horn bits and pieces in the column you will get at some by pulling the button off but the rest are south of the steering wheel and south of the steering lock mechanism. You would need to take the steering wheel off and the lock steering plate off. take pictures as you go because there are certainly a few bits and pieces, springs and the like. You would need a steering wheel puller, or you can make a steering wheel puller fairly simply with a plate (drill two holes in it at the spacing for the two bolts that will thread into the steering wheel), two bolts to thread into the steering wheel and then fit a socket between the plate and the steering column shaft (after taking the steering wheel retaining bolt off the shaft) and after marking the relationship between the shaft and the steering wheel for reference during reassembly. Then tighten down the two bolts and the plate should pinch the socket between the plate and shaft and pop the wheel off the shaft. The steering lock plate is spring loaded and has a small ring clip around the steering shaft. You can reach it by pushing down on the lock plate and compressing the spring. I just use a couple small screwdrivers and pop the ring out of the groove and slide it up off the shaft. I'm sure there is a tool for that but I have never used one, the lock plate is keyed to match the groves in the steering shaft so it only fits back on in one position. I have taken these columns apart too many times to count. The first time is the hardest but after you do it a few times it gets a lot easier. I used to part out late 70's early 80's GMs years ago so I have taken lots of them apart.
The Fleet
2018 Toyota Camry XSE V6
79 Chevrolet 3/4 ton Pickup Fully Restored with matching 78 11' Camper
80 Monza 2+2, Cloned into a 79 Monza Spyder V8 4 Speed (Current Project)
80 Monza Spyder V6 Auto (parts car, sadly)
80 Honda CB750K Fully Restored with Custom Full Dress
80 Honda CM400A 10,000 Orig. Miles Full Dress
75 Honda XL250 Fully Restored (first vehicle I ever owned)
73 Honda SL125 off roader
72 Honda Motorsport 250 (XL250) off roader