I've got the manual link (thanks!), just wonder if anyone's seen this before I start the troubleshooting procedure. Man, there's a ton of shit under that dash to sort thru. BTW, the speedo works. The dash light does not come on when I power up the cruise.
Turns out it was the slip rings in the combination switch, behind the steering wheel. Found it because the horn was intermittent. Hope this helps someone else. To check, remove and rotate steering wheel 180 degrees to get to an unused spot on the slip ring. Now, anyone got a comb. switch for an 89?
That's the part number for the 89 slipring. It's about $50 retail, not sure if you think it's worth it to get a brand new one. I would, since it will help make sure your horn/cruise works for another 20 years.