Turn signal frequency

[Bryan_N]

Does your car have the side repeaters in the front wings?
If so, the problem is probably a high resistance connection in the bulb socket caused by corrosion

See this -

[xj40] INDICATOR PROB

In reply to a message from XJ40-MARK sent Fri 17 Jul 2009: Mark, The problem with your indicators is not the BFM. The unit which controls the indicator flash rate is the CPU. It is so designed that, unlike the old ‘hot wire’ flash units which flashed the remaining external lamps at double speed if one bulb was out, when one of the bulbs is out or that bulbs circuit is high resistance (as in the case of a corroded bulb socket / ground) the dash indicator repeater will flash at double spe…