I recently bought an old farm truck with lots of minor problems. I figured it was kept running well enough, considering the chassis has 300k on it. It is a 3rd vehicle for the sometimes heavy-duty jobs that just can’t be done with a compact.
My last safety concern related job involves fixing the taillights. One running/brake light worked when I bought it. I took the housings out and discovered that the original wiring was cut and new wires were run to both tail lights. The reverse lights were never replaced. I tried reverting back to the original wires; they don’t work. I reconnected the replacement wires on both tail lights and now the running light,brakes and turn signal work… except for one thing. When I depress the brake, the turn signal is interrupted! I thought it was supposed to work the other way around.
What can I do to make the turn signal work when I am pushing on the brake?