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Thread: UGH! Wiring Troubles...
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kansei
Redlining
Wankelized
Posts: 423
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posted September 20, 2007 03:42 PM |
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UGH! Wiring Troubles...
OK- I need help (any help!) with a wiring issue on my '74. Completely stock wiring, ignition, etc. Headlights, hazards and horn didn't work. Flasher control unit on driver's kick panel 'clicks' when horn is depressed, as if relay isn't responding properly.
I had my fuse block bead blasted as Charles suggested in one of our conversations. Hazards now work, still nothing on the horn or headlights. I changed out the flasher control unit with one from my parts truck, still the same deal- it 'clicks' when you try to sound the horn, and the headlights are still no-go. Combo switch has been changed out- still the same deal. What am I missing?
Thoughts?
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Neal A.E. Swigert
Greenville, Michigan
1974 REPU Resto Project
1976 808 Wagon
1977 Cosmo
1978 Savanna RX-7 GT
1980 Leather Sport RX-7
1980 Petty Targa RX-7 #11
1985 GSL-SE RX-7
1988 RX-7 10th Ann
1993 RX-7 VR Touring
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jfaplanet
Redlining
Posts: 356
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posted September 20, 2007 04:51 PM |
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address
Neal, get me your mailing address, I need to send you some parts and stuff. I had a problem like that happen to jethro, wipers wouldn't work. It was the relay box. Sounds like its getting power if the relays click. I'm busy now on a call as soon as I get thru,(may be a little while) I'll call you.. I got the drawing here at my desk. We'll trace down the wires and see where we are loosing it. Could be one simple ground or power lead. I'll call you...Charles
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74 REPU "Red"
74 REPU "Jethro" "TII"
74 RE-Courier vert
79 SA-SE(aka deathtrap)
79 SA-SE-FC (project
turbo)
http://home.bellsouth.net
/p/PWP-crgj
TN Forum:
http://tnrotary.10.forume
r.com/
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Klaus44
Redlining
Posts: 365
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posted September 20, 2007 06:37 PM |
Edited By: Klaus44 on 20 Sep 2007 18:39
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I've had a similar problem.
Real b--ch, too: Presumed ground issue at the relay box itself, (the one on the Left side, forward of the driver's door). Mounting bolts rusted -- (tend to break off...) -- quite the PITA to access/derust/restore positive ground! 'Ugh', indeed...
Also try contact cleaner on each and every contact/connect -- as well as tracing voltages/resistance in wires with your multimeter, to try to track down any(intermittent?) shorts internal to the wiring, inside the insulation...
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Jeff20B
Moderator
Posts: 661
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posted September 21, 2007 10:55 AM |
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The relay is supposed to click. That means it's working. The horn is bad.
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kansei
Redlining
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Posts: 423
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posted September 21, 2007 11:18 AM |
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Thanks guys.
Charles- I noticed your post late last night and then noticed you must have called my cell (the 330 number), which doesn't always ring at the house. Sorry I missed ya.
Klaus- Thanks, I thought about that.. it looks fine, plus I had changed it out with one from my spare truck.
Jeff- Yeah, I just discovered that yesterday. Took the cover off one of the control units and saw that they are "old" style breaker-point style relays. I guess when the horn worked before I just never heard/noticed the clicking because the horn was working...
I'm going to try and get some time tonight or tomorrow to really dive into the truck and figure out exactly what's wrong with the horn and headlights. Everything worked before, when the truck had the butchered harness in it (not my doing), now with a really nice unmolested one (thanks Max & Klaus!!) in it and stock everything, those few items no longer work. Just one of those things...
Keep the ideas coming if anyone else thinks of anything or had similar problems with their trucks headlights and horn (though Jeff is probably right about the horn).
Neal.
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kansei
Redlining
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Posts: 423
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posted September 23, 2007 04:30 PM |
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Finally...
I got some time this afternoon to look the headlight and horn issues over. I tracked the headlight problem down to a bad ground (I think Klaus mentioned that). The horn was just as Jeff thought- horn itself was bad (the passenger horn was missing when I got the truck). So I took the old rusted horns off my '76 parts truck, installed them on the '74, and voila!
I just wanted to say thanks to all for the help and suggestions.
Neal.
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Klaus44
Redlining
Posts: 365
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posted September 24, 2007 08:05 AM |
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You're welcome, Neal!
...now I just need you to come visit for about a week, and help me deal with multiple similar cleaning/diagnosis/repair jobs...
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kansei
Redlining
Wankelized
Posts: 423
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posted September 24, 2007 06:33 PM |
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HA!
That week of vacation/work will have to wait my friend, but I'll take a raincheck! I do want to come visit out that way pretty bad. I'm lucky I didn't push my truck out front and put a "FREE" sign on it after all the grief I've had getting her back into shape this year. The only stuff left before I'll consider her "done" for now is the A/C, rebuilding the front suspension, swapping out the bumper for the nicer one on my blue '76, install the radio and a few other odds and ends.... should be done within the next two weeks at which point I'll be putting up a bunch more pics in my gallery album.
Neal.
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