Cruise Control Wiring Help!!!
Thread Starter
|
New User
Joined: Sep 2009
Posts: 24
Likes: 0
Cruise Control Wiring Help!!!
I am installing cruise control in a 78 f150. I just hooked up all the connections in the cab and I have no horn, no turn signals, brake lights are still working off the 2 prong switch. Any suggestions? The groundwire is hookep up and so is the black box for cruise.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
Can you describe how you wired it? I'm not as familiar with the truck cruise control, but in the same-era cars, the cruise control harness piggy-backs the turn signal harness (meaning you disconnect the turn signal switch, put the cruise control harness in between, and reconnect). The piggy-back harness then goes off to the control unit.
If your '78 truck didn't have cruise control originally, then it wouldn't have a horn relay. However, the cruise control setup requires a horn relay. So I believe that the correct cruise control harness will have a lead for the horn relay. Again, though, this is the case for same-era sedans, so someone else may have better details. At the very least, however, I can tell you for sure that adding cruise control to a '78 or '79 truck requires the addition of a horn relay.
If your '78 truck didn't have cruise control originally, then it wouldn't have a horn relay. However, the cruise control setup requires a horn relay. So I believe that the correct cruise control harness will have a lead for the horn relay. Again, though, this is the case for same-era sedans, so someone else may have better details. At the very least, however, I can tell you for sure that adding cruise control to a '78 or '79 truck requires the addition of a horn relay.
Thread Starter
|
New User
Joined: Sep 2009
Posts: 24
Likes: 0
Got it straightened out for the most part. I pulled the cruise harness back off and started checking wires with a test light. I plugged the cruise harness back in and it started working. I guess it just didnt make a good connection the first time. I'll have to wait to make sure the rest of it works when I get my 4 speed tilt column in.
Thread
Thread Starter
Forum
Replies
Last Post
conoso
1973 - 1979 F-100 & Larger F-Series Trucks
23
Sep 27, 2012 10:12 PM
