Wipers will not automatically "home" when turned off

[Bob Otte]

Rained today so it reminded me that if I want to turn my wipers off I have to time it with the down position or they will automatically stop in whatever position they happen to be when I throw the switch. I assume this is a relay issue but I am not sure if there is a relay in the motor itself that needs to be addressed or if it is a standalone on the 70 Series. My truck is a '86 BJ73 if that makes a difference.

Can anyone who has knowledge of these components please chime in? TIA

 

[peterb]

On my 40 series it was a ground issue. Maybe try using a jumper wire to a known good ground and see if that helps?

 

[RedJed78]

80 series intermittenly have the same problem...slightly. it doesnt stop half way right in view of where you need to see but 1-3" from its home resting place. your's worse?

 

[Bob Otte]

These will run as long as they are switched on but when I turn them off they stop immediately and I have to toggle them to get into their normal resting position.

 

[RedJed78]

oh OK gotch'a.

 

[george_tlc]

On my '80 patrol there is an intermittent control module. That module other than providing the intermittent function also has the responsibility of returning the wipers to their 'home' position. Possibly Toyota implemented the same scheme... Check the workshop manual to see what is wired to what...

cheers,
george.

 

[Bob Otte]

On my '80 patrol there is an intermittent control module. That module other than providing the intermittent function also has the responsibility of returning the wipers to their 'home' position. Possibly Toyota implemented the same scheme... Check the workshop manual to see what is wired to what...

cheers,
george.

Thanks George, I really do need to get a manual for this thing

 

[Bob Otte]

I'm going to go with bad wiper motor after checking a few things over. Time to head to the classifieds . Thanks for the ideas guys

 

[876 Cruisers]

Does your cruiser carry the intermittent or push up to do a one wipe? because if it carries an intermittent switch it would carry a relay. If they relay isnt functioning properly chances are that could be the case as to why it stop wherever you stop it.

 

[Bob Otte]

Thank you for the reply but it does not have intermittent option

 

[rusty_tlc]

I have fixed this problem on an FJ40. I'm not 100% sure the 70 series used the same scheme but Toyota tends to stick with a design'
On the 40 there is a circuit board inside the motor, a set of brushes contact traces on the board. Just past the home position there is a "jumper" that stays hot when the switch is off, when the switch is turned off power is supplied until the rotation gets to the break in the trace at the home position, then rotation stops.

On reflection it may be the ground that is opened, Toyota switches ground rather than +12V sometimes and I worked on this a few years ago so my recollection may be fuzzy on the finer points. At any rate the principal is the same.

Either way there was an open circuit to that extra trace on the PCB.

Not sure if this helps with the 70 series but it may.

 

[Gun Runner 5]

@Bob Otte
Did not notice your Cruiser here .... U.S. 70's Registration.