capacitor on 69 wiper motor, why?

[tomolmsted]

On my 69, there is a capacitor that is supposed to be connected to my wiper motor. Would anybody happen to have a pic where it connects (it's been 5 years since I took it off)? Anybody know the purpose?

Tom

[964TargaC2]

One purpose of a cap is electronic noise suppression, I dont know if that is the reason it was put in the circuit however

[Redbarnman]

A capacitor on a small electric motor suppresses electrical spark radiation from the commutator which you hear as noise on the radio. The nearer the motor is to the antenna the more likely it is to cause a problem. Capacitors would either be connected between + and - connections on the motor or between + and a local ground screw or bolt nearby. Capacitors are polarity sensitive so make sure it goes on the right way.

[theiceman]

Originally Posted by Redbarnman

A capacitor on a small electric motor suppresses electrical spark radiation from the commutator which you hear as noise on the radio. The nearer the motor is to the antenna the more likely it is to cause a problem. Capacitors would either be connected between + and - connections on the motor or between + and a local ground screw or bolt nearby. Capacitors are polarity sensitive so make sure it goes on the right way.

Only electrolytic of course . not sure if that one is but dont panic if the cap has no markings to indicate polarity.

[3rd_gear_Ted]

$6.00 for one these@ Allied Electronics, a modern device to replace the 1969 Capacitor

RC Snubber Noise and ARC Suppressor, Max Line Volt: 250 Vrms

Mfr. Part#: SNUB0000
Allied Stock#: 70030263

[James Brown]

thats all smoke (aka Lucas electrial) you discovered the FLUX CAPACITOR , DONT SHOW IT TO ANYONE!

[tomolmsted]

So sounds like PO installed and it's not really needed. Especially with modern radios.

[964TargaC2]

Probably needed it with AM radio or an add on 8 track or similar..