[400bird]

So i have a 67 coupe, and the wipers are not working.
There is power at the motor, but I dont think the switch is grounding it to turn it on.
And of course I am like 250 miles away from the manual with wiring diagrams that I forgot at home.
So I any one has online wireing diagrams, or could please help me,
Thanks
Jon

 

[JimM]

search for "color wiring diagrams" Larry, aka 69-er did a nice set and has posted them a number of times. If you can't find larry's, geezer has also posted links to scans out of the aim. if you can't find either, shoot back, I have larry's on disc and can email them.

 

[400bird]

yup i found larry's before I posted this, but his wiring diagrams are for a 69, and i am pretty sure they are different

who makes the upgrade wiper motor with intermitant?

 

[400bird]

ok nevermind about the intermitany wiper motor, its from detroit speed

 

[JimM]

The wiper wiring on all 3 years is the same.

 

[69-er]

Right, the only real difference is the wiper switch terminal configuation, (and maybe the wiper motor terminals themselves?) The functions of each color of wire is the same.

400bird, if you want, I can email you an updated diagram of the wiper system, as the ones I have posted are a little out of date. I also have the entire manual in the forum classifieds. You see the details of what's included in the manual there.

Larry

 

[400bird]

Wow, thats all i have to say, these wiring diagrams are amazing, thanks 69-er
I will buy a set when you make the set for 67

one question, is left, which way the connectors go on the motor, i think they connect in this order from passanger side to driver side, i just want to double check

black- black/yellow-light blue

oh i almost forgot, the wiper motor in the digram has a case ground, if the motor grounds through the switch, why would the case need a ground (i ask because, both my old one and the replacement do not)

thanks guys

 

[400bird]

please guys could some one take a look at their wiper wiring and tell me the order of the wires coming out of the top of the motor?
thanks
Jon

 

[69-er]

Wow, thats all i have to say, these wiring diagrams are amazing, thanks 69-er
I will buy a set when you make the set for 67

Thanks for the compliments! As soon as I find a suitable 67 and 68 wire harness to base my drawings on, I will have the 67 and 68 diagrams out as soon as possible.

oh i almost forgot, the wiper motor in the digram has a case ground, if the motor grounds through the switch, why would the case need a ground (i ask because, both my old one and the replacement do not)

thanks guys

The case needs be grounded in order for the park mechanism to work. When you turn the switch off, the circuit is no longer grounded, so the case ground provides the ground to keep the motor running until the park contacts open which breaks the ground at the proper time to park the wipers.

In your case, if the wiper motor is like the 68 and 69's, one of the rubber mounting grommets has a thin metal strip that grounds the motor to the firewall.

Larry

 

[400bird]

ok thanks,
the lower right mount does have a small ground strap, i didnt make that connection in my head that that was the ground

and i got the problem figured out,
1) the fuse holder was rusted and adding about 400 ohms of resistance, so with the power to the motor disconected the wire read 12V, but there was too much resistance to run the motor
2)the connection at the fire wall was also kinda iffy, so if i wiggled the bulkhead connector i would loose connection on the light blue wire

so i fixed those 2 and replaced the motor and everythings working now


oh and for anyone out there wondering order of the wires from passanger side to driver side
black - light blue - black/yellow

 

[69-er]

Great! Glad you were able to get it going again!

1) the fuse holder was rusted and adding about 400 ohms of resistance, so with the power to the motor disconected the wire read 12V, but there was too much resistance to run the motor

That was a good lesson in electrical troubleshooting that occurs every now and then. With resistance in the circuit, i.e. a bad connection, you can read 12 volts, but when the current increases, as when the motor was turned on, the resistance in the connection reduces the amount of current flow and the voltage drops. You demonstrate this at the positive terminal of the ignition coil, also (with breaker points). Disconnect the resistor wire at the positive terminal of the coil, and with the ignition on, read the voltage at the wire. It will read battery voltage. Connect the wire back and you will see how the voltage drops to around nine volts or so. The coil loads the circuit and produces the required voltage drop for the points to operate.[/quote]