You have a bad earth. The indicator power is trying to find an earth thru the brake light wire.
Take the builds out and clean all contacts to bright metal, also clean the wiring plug, check ewarths with a tester and if any suspicion of bad or intermittent earth just scotchlock a new earth onto the indicator earth wire close to the bulb and run it to the car body, crimp a ring connector to the other end and use a self tapper to fix it to the body or fix it under another earth point already fitted, clean that up too.
Posted on Tuesday 17th of June 2014Don't understand this? Ask a question