Hi,
Im rewiring and upgrading my kids ride on car and for the life of me i cany get the relay to work for reverse. It all works in FWD although when you select REV it still goes FWD!

Here is my wiring diagram that i am using. Any thoughts?

 

Have you tried just putting the motor onto the battery and than swapping the leads to make sure the motor is reversible?

 

Yes they are reversible motors.

 

I am not familiar with the particular relay.
But here is one using 2 Automotive relays.

 

Hi,
Im rewiring and upgrading my kids ride on car and for the life of me i cany get the relay to work for reverse. It all works in FWD although when you select REV it still goes FWD!

Here is my wiring diagram that i am using. Any thoughts?

Pins 7,8 are the relay coil i assume, so what happens if you reverse these pins?

Looking at the wiring, the relay has a set of change over contacts, but your relay maybe faulty.

 

On your circuit,it looks like your coil is energized all the time as the battery is connected across the coil, if 7 and 8 are the coil pins. I don't know what the F/R block is.
Any forward/reverse switch needs to be in series with the coil, not cross it.
Do you have a relay type number?

 

Yes pons 7 and 8 are the coil

How do i test if the relay is faulty? I have connected a battery straight to the coil and you can hear the coil clicking

 

Pins 1, 3 & 4 have continuity when REV is selected

 

Pins 1 and 3 should never have continuity if the switch is indeed being used for reversing, but might have if the switch is wired for forward only.

 

From your diagram the coil is permanently connected to the battery so will always be energised so the motors will always run in the same direction.
Your forward/reverse switch should switch the power to the coil on and off.

 

Your relay is a Non latching type, so your wiring diagram shows the relay will only reverse direction when no power is applied to the coil, and forward direction with power on the coil,.


Same diagram here with power on wipers..

 

Appreciate all the feedback and comments although i have no idea what im doing and surprised i have gotten this far with the project.

Can someone help with a diagram on how my relay should be wired so that Forward and Reverse will work?

 

Your relay is correctly wired, it will only change direction when no power is applied to the coil,.

 

Try this :-


Caveats:
1) Suddenly reversing when the motors are running at speed will cause a big current surge, which the controller may object to.
2) Arc suppression capacitors should be connected across the relay contacts to prolong their life.

 

So basically i just change my pins 7 & 8 to instead of having 4 wires in pins 7 & 8, i just have 2 wires incorporating the Forward and Reverse switch?

 

2) Arc suppression capacitors should be connected across the relay contacts to prolong their life

Alec - are you able to explain this a little more? I have capacitors across the motors, is that enough or do i need a capacitor across the relay as well?
If not, What size capacitor do i need and across what pins?

Thanks

 

I wired up the F/R switch as per Alec diagram and whether its in F or R it didn't change the polarity.
Any ideas?

 

When you operate the F/R switch can you see the relay switching?
If not then the wiring is still wrong.

 

I wired up the F/R switch as per Alec diagram and whether its in F or R it didn't change the polarity.
Any ideas?

Sounds like your relay is wired wrong or the motor is, post a picture of the relay wiring.

 

So...
Pin 1 = is brown wire which loops to pin 4
Pin 2 = is other brown wire which loops to pin 3
Pins 1 & 2 are also connected to the battery output terminals of the controller
Pin 5 & 6 = wire motors
Pins 7 = GND
Pins 8 = pin2 of F/R and pin4 of F/R is connected to +VE (brown wire)

Pins 2 & 4 of F/R has continuity when R is selected