Gents I replaced the water pump all the belt tensioners and pulleys and the viscous fan and then just after fault thrown up saying open circuit and warning light on dash so out with 11d tool cleared fault stayed off for a few minutes then back on alternator is giving out 13.7 volts so am assuming that the fault is not because of poor battery or charging
Any pointers as where to and what to test next Ta

Meant to ask I am assuming that 13.7 from alternator is ok