Howdy all, so yesterday i took my vett to a friends house to check on a rear end he had for sale, sadly it was the dana36 and not the 44. Anyways while we where there i asked him to help me figure out why the horn isnt working, so we poped the hood tested the horns with a hot wire and they honked. While under the hood he noticed some missing bolts and the plug wires sitting in a bad spot and even melting the plug holders they where on. Him being a life long mechanic wouldnt let me leave without fix the small details. SO he took off the vacuum hose going to the brake booster and moved one bad wire(even took it off the plug) and hooked everything back up, no fuss no muss right... we also checked on some wires for the horn after that and he look at a relay that was a possible lead to the horn which it wasnt, (this relay was on driver side firewall way down low with green/white wire on it). After that we popped a couple of fuses to see if the horn fuse was blown, and of course i didnt have any of my books that would have told me which fuse it was, so we popped out like 5 or so. ANYWAYS to make a long story short(i know to late) NOW my vett is taking forever to start, like 5-8 cranks, after it has sat for more then 30 mins and it shows a check engine light. Even when i left him it was hard to start, so we looked over everything we touched(which wasnt much as u can see) and all seemed fine. i turned the car off and restarted and fired right up and NO check engine light came on. So i left and figured all was OK and she drove and idled great. This morning same thing happened and again at work. I havent had a chance to TRY and pull a code from it BUT i was hoping it was something dumb that i did. Could pulling the fuse have reset something. I have read a couple of old post talking about the FPR, but where is it located at, could it have been a relay i moved and made a wire come loose or something? Anyways thanks for the help and so sorry this is winded, but i know how you guys like to have all the details on everything. Also today i would just shut the vett off and restart it and it would restart no prob and have the check engine light go out also. Engine is in profile, but again it is a 85 L98

P.S. Also after all that we never did figure why the heck the horns dont work, but he tested the steering column and said there is no power in it for the horns, so atleast i have something to work on from there..

 

I'll start with the horn, i personally have never seen power in a steering wheel for the horn. Most or maybe all cars use ground to control a relay that powers the horn(s) Test the 10 amp "theft fuse" in the auxillary fuse block and the contacts on the horn button. Not 100 % sure if my 86 info is the same for the 85, but here it is anyway
http://members.shaw.ca/agent86/Horn%20Electrical.pdf
As for the hard start, maybe while fussing with the wires, he came in contact with the fuel pump relay. The wire insulation will be probably shrunken back leaving bare wires that could come in contact with each other. Worth a look.
http://members.shaw.ca/agent86/Fuel%...elivery-8A.pdf
http://members.shaw.ca/corvette86/Fu...mDiagnosis.pdf

http://members.shaw.ca/corvette86/Co...0View%2086.pdf

 

The horn relay coil is connected to 12v through the 15 amp theft fuse and the other coil wire goes to the horn switch in the steering wheel which grounds the coil wire to activate the horn. First check the theft fuse with an ohmeter. You can test the horn relay by grounding the wire that goes to the horn button. On my 87 this wire is black at the relay. Listen for the relay clicking. No click, possible defective relay coil. Clicking and no horn sounding, defective relay contacts. Check for 12v on the hot relay wire which on my 87 is pink. You can also jump 12v to the horn wire on the relay which is dark green on my 87 and the horn should sound. Some CFers have found a poor ground at the horn button in the steering wheel.