hey guys, i followed clayne's gauge install how-to ( https://www.rx7club.com/showthread.p...ght=defi+gauge ) to install my fuel press., egt, and oil temp gauges. everything went well. i mounted them in the flyrx7 triple gauge pod on the dash and ran all my wires under the defroster grills. . . (kinda hard. . . then easy once you get the hang of it. i thought my method to be quite ingenious, actually). . . anyways, back to my topic. i plugged everything up PER his thread. . . now my horn honks when i shut the car off. . . i think its when i push the key INWARD a little hard (as usual when you arent thinking about the way you turn your car off) as i turn it off that it does this. i can get it to NOT do it, but i have to be careful. point is. . . your car isnt supposed to honk when its shut-off. has anybody else ever had this problem?

i think the one lead that is in question on his install thread is the "blue molex" connector. i spliced into the blue one that had the orange one wire connector going to it. thats the only one that i found that had the constant 12v (batt).

okay, enough of my horrible descriptions. . . has ANYBODY else had this problem.

paul

 

hmm. . . well, that sucks. . .

 

Just check the wiring layout in the FSM. It's in there. Chances are, you grounded out the horn somehow and when the DEFI unit shuts off, it completes the loop for a moment in time.

 

just the man i wanted to hear from. the dimmer **** actually shuts the down too. . . just like you mentioned on the thread. . . but i always keep it all the way up anyways.

does that wire GO to the horn or something? i noticed it didnt honk while it was unplugged. . . im assuming YOURS doesnt do any of this???

thanks,
paul

 

bump for paul

 

I tapped different places... So I'm not sure what/where the B/O wire is.

Consider this; the horn relay coil wire, that goes to the horn switches, is G/O (green w/orange stripe). [Edit: ...and reading later in the thread, it looks like you're well aware of that. ] That green could look blue(-ish) depending on surrounding light. You probably tapped it instead.

Electrically, the behavior makes sense. The unit probably draws its power from the switched 12V line when it's operational. When you switch off, it draws current from the constant 12V wire instead, which would be the horn relay, in this case.

You'll want that disconnected right away. When the horn relay shuts off, the coil will cause a flyback voltage, possibly damaging any electronic device on the other end (eg. the defi control box).

I've always double checked the wire colors with the connector diagrams at the bottom of the diagram sheets. It's easy to confuse green, blue, purple and black stripes - especially when contrasted with another color.

 

i tested that wire before i used it. . . its a constant 12v powersource. thats why i used it. the switched 12v is coming from the right most empty spade on the fuse block.

are there any suggestions for my 12v constant?

paul

 

Since its near the same location why dont you use the 12v constant from the radio ?

 

thinkin about it. . . BUT id have to take it out to get to it. . . unless someone knows where i can get to it w/o taking the radio out.

paul

 

Can't help you there man...

 

Yep. That'll happen. It will test as a constant power source. The meter (or maybe even an "automotive" test-bulb) wont pull enough current from the relay coil to trigger it or cause any noticeable inductive effects. The horn-switch end of the coil (G/O) will appear as a short to +12V. [edit: that is, until you press the horn switch, which grounds this wire]

Near the steering column, you can use a B/G (Black, green stripe) or a L/B (blue, black stripe).... according to my '95 FSM, anyway. You shouldn't have to remove anything to get to it... well, except for the seat, if you can't fit in there. I think I tapped the B/G for another accessory over a year ago. It's a tight work area, though.

 

is that wire in the same area??? the blue molex connectors? i have to go by other means of locating color-coded items. . . colorblind. hehe.

thanks a lot!!!

paul

 

Just face it, your FD just wants to be driven more. This is a cry for help!

 

Are you parking in a bad neighborhood or something? I think your car is just scared and wants everybody around to know that it has an alarm

Alright sorry to interrupt...... back to the helpfull information.

 

ok I'm not Rowdy Rotary... but I thought I'd give him another post before I log out and log back in as myself. Probably best that I don't claim that one anyway

 

hehe, its pretty funny really. . . i used to get stares cause my belts were the wrong size and theyd squeal all the time. . . now, i get looks when its off. . . had some very serious storming today so i couldnt get to it. . . tomorrow is another day!!!

paul

 

I remember it being very near the steering column. I'm pretty sure I tapped the ignition switch's harness. It was a 6 conductor connector with heavier-than-usual-gauged wires. Let me take a look tomarrow.

Those color combos are probably used again in other harnesses. I don't blame you for being cautious.

There are a few blue molexes.... I'm not sure which one you're looking at.

There's a L/R (blue/red-stripe) on a green connector on the joint box (JB-02) that goes through the ROOM fuse. That's another possibility. The diagram says it should be on the upper-left corner of the harness, if you look at it as it sits in the connector, and with you looking toward the front of the car from inside.