I spoke to my contact at Roadmaster and he told me that most likely your problem is a bad air cylinder. He said you can test this by removing the air cylinder and taking it back to the quick disconnect at the rear of you RV. Depress and release the brake pedal. If the cylinder doesn't extend and retract it is bad and needs to be replaced.
The replacement air cylinder is the part # RM-9100-50. view full answer...
The Roadmaster Crossbar-Style Base Plate Kit part # 3141-1 which is a fit for a 2009 Chevrolet HHR will take around 4-6 hours for installation based on experience. I have attached for you below the installation instructions if you would like to review them. If you need help with installation, you can use our install locater tool to get the base plate kit installed locally. The link for this is located on the product page under the videos tab. view full answer...
Good job in testing using a different trailer! You've effectively eliminated the tow vehicle as being the problem.
You are absolutely on the right track in suspecting a ground problem to be the cause of the issues you're having. The fact that none of the lighting functions are working would tend to rule out a loose connection or broken wire.
A trailer connector will typically ground to the trailer tongue. From the trailer connector, trace the white wire to where it attaches to the trailer... view full answer...
I'm sorry to hear you are have a problem with your Roadmaster Even Brake # RM-9400.
I reached out to Roadmaster directly and they mentioned that once you install the Roadmaster Even Brake and turn it on you will hear it pump up and then you will need to press the test button on the Even Brake which will cause it to engage the vehicles brakes three times. If it does not engage the brakes three times it will send an error code to the controller that will help in troubleshooting the issue.
If... view full answer...
The Roadmaster Universal Hy-Power Diode Wiring Kit # RM-154 that you referenced should not have a jumper wire between the diodes in the turn signal circuit. This jumper wire runs between the diodes for the tail and/or brake light diodes depending on the nature of the wiring in your motor home.
I suggest having your installer complete the installation exactly as described by the manufacturer and as shown on the linked page for this item. I also included a video showing this kit used on... view full answer...
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