help 1.9td 406 saloon p reg

[pjb0150]

fitting a turbo boost guage
i now try to start engine no glow plug light
engine turns over will not start .....

other month i disconnected the key pad whilst running and she has been no trouble ever since ...
as i turn key i do hear funny sunds like the fan is trying to kick in --relays clicking etc
wondering if the thing has armed itself again somehow
thoughts on this please
phill

[Gary406]

i have to ask this . why on earth would you fit a turbo boost gauge to an old diesel ?

[pjb0150]

monitor turbo pressure ....

i suspect its something to do with immobilser as engine man light looks dimmer than usual and no glow plug light
i was fitting guage to centre console where there is a small led light
wonder if i have upset that somehow