1978 E250 with serious wiper problems

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Feb 15, 2009 | 04:18 PM

Crazz

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1978 E250 with serious wiper problems

i just recently bought a 78 e250. van is in excellent condition, other than the wipers. it has intermitting wipers. and they work when they want. i took the black box apart and re soldiered some of the joints. someone had the box bypassed and they was still wierd worked when they wanted.

so i put it all back together and they only work when they want. sometimes they will not shut off. here is all the numbers off the black box
8z
D5ub 17c476 AA
260

19 B

also need the wiring before the car side plug out. its all hacked up. if anyone can help i would greatly appreciate it. i cant drive this thing till i get them fixed because of inspection. just let me no how much in total shipped to 17019. also need the black box. so hopefully it will already be wired into the harness

also the wiper motor makes a popping noise while it is running

Feb 15, 2009 | 05:20 PM

Crazz

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also just installed a brand new wiper switch and the wiper run constantly no matter what, i have to turn the key off to get them to stop

Feb 15, 2009 | 07:11 PM

Crazz

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anyone have a wiring diagram for these wipers ?

Feb 16, 2009 | 04:52 PM

rclarke

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A wiper motor that runs continuously until the ignition is shut off has a bad switch in the motor. A new motor is the normal repair.

Feb 16, 2009 | 05:06 PM

Crazz

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thats pretty much what i figured. i bought a new one today. just need to get my butt out in the garage and get a good fire brewing and install it.

Feb 16, 2009 | 07:14 PM

Crazz

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wiper motor didn't fix the problem, does anyone have a diagram of the delay box ? the numbers thas on it is 17c476 D5UB

Feb 23, 2009 | 11:06 AM

Badge1

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wiper relay

The "black box" you refer to is the wiper relay switch. The motor is not the problem if it's running. It dosen't have a switch in it. The switch is on the dash and the relay controls the wiper delay function. The wiring you changed just changed the correct configuration to an incorect one. I also have been looking for the same relay switch recently for my 82. I have one I pulled from a 79 with the same numbers but haven't installed it yet. If you find a source..post it here.