Traffic lights at the White Elephant junction in Northampton failed yesterday due to a faulty switchboard, Northamptonshire County Council said.
A spokesman said highways workers are looking at solving the problem permanetly after a number of a expensive call-outs.
This was a different fault to the last time the lights failed.Spokesman for County Hall
The lights - which have been crashed into by cars and suffered at least half-a-dozen faults since Christmas 2014 - failed again on Wednesday.
The last time they went out - on April 17 - the electrical parts were blamed.
Yesterday repairmen found another elctrical fault but this time with one of the switchboards.
A spokesman for Northamptonshire County Council said: “A problem with the traffic lights at the White Elephant junction was reported at 7.40am on Thursday with repairs carried out by 8.30am.
“The lights have multiple switchboards and there was an electrical fault with one of the boards. However this was a different one to the last time the lights failed.”
The spokesman said a deeper investigation into the wider problems, in order to avoid multiple call-outs, will be carried out “in the next few days”.