Red or yellow oil light.

[g8ape]

Out for a drive last Sunday in my pre-cat 400 and the red led dash light came on I assumed it was the oil light yet the oil pressure gauge showed good pressure. I convinced myself it was a duff pressure switch so changed it, no difference.... Then searched this forum and found a thread about the yellow oil warning light doh!
And no I didn't refer to the handbook.

Sure enough unplugging the oil warning sender extinguished the yellow led, and the battery voltage measured 12.6 volts engine off and 12.3 volts engine started. I had a fresh alternator so swapped this yesterday and with engine started the battery measured 14.3 volts and the yellow led was extinguished.

I thought I would share this in case anyone else has a sleepless night unnecessarily worrying about there engine like I did.

I'm going to swap the red and yellow led's around because in pretty much all other cars I've experienced the oil warning light is red.

[TVR Beaver]

was you old unit duff... or is your 100 amp fuse on the way out

[g8ape]

I assume the old alternator was duff as all is good with the new one fitted, can the 100amp fuse cause the same fault?

[Ant.]

You won't find the 100amp fuse on your precat.......

[g8ape]

So pre-cats don't have the 100amp fuse?

[carsy]

g8ape said:

So pre-cats don't have the 100amp fuse?

No not on the pre cats. One less thing to worry about.

[g8ape]

Great thanks for that, I will get back to worrying about under bonnet temperatures and a suitable type of bonnet vents...