Really need help!

[Harald Kapp]

but could the motor be a higher voltage?

If it works from the battery or directly from the power supply, it is supposed to work from the controller, too.

 

[Harald Kapp]

Hmmmm, does it work directly from the power supply (no controller in between)?

 

[james.50cal]

when the motor is connected the bulb will go off

 

[Harald Kapp]

Looks like the motor draws too much current. The motor is possibly not rated for 12 V but less.
Try a 6 V lamp in series with the motor.
Or even the12 V lamp you just used.

 

[james.50cal]

yes it works directly from the power supply

 

[james.50cal]

I dont have a 6v lamp. do you think I should just buy a new 12v DC motor

 

[Harald Kapp]

do you think I should just buy a new 12v DC motor

That is one option, but try the lamp in series first. A 12 V lamp will suffice for the test, albeit the motor will be rather slow.

 

[james.50cal]

so run the lamp and motor directly from the power supply?

 

[Harald Kapp]

yes it works directly from the power supply

So the issue seems to be the power delivery from the controller.
Do you have a multimeter to measure the current the motor draws when connected directly to the power supply (no lamp)?

 

[Harald Kapp]

so run the lamp and motor directly from the power supply?

No, from the controller.

 

[james.50cal]

no I dont have one of those. If I run them from the controller at the same time neither the motor or light will work

 

[Harald Kapp]

If I run them from the controller at the same time neither the motor or light will work

Lamp and motor connected in series? Not in parallel.
Series means: wire from controller to one pin of the lamp, from the second pin of the lamp to the motor, from the other pin of the motor back to the controller. At least the light should work then.

 

[james.50cal]

oh ok I will try it

 

[james.50cal]

I tried that and you are correct the light works but not the motor

 

[Harald Kapp]

I think it's time for a new 12 V motor, sorry.

 

[james.50cal]

Thanks for all of your help I really appreciate it, you are a clever man! I decided to buy a rotisserie motor instead of messing about getting a new 12v motor.