cinqs do not have overheat lights. hence the "modified wiring " bit
They have a gap at the end where one could be wired to. but no bulb, or wiring.
I have GT fan switch. Two stage switch. Stage 1 brings the fan on at 87 i think. Stage 2 has no use on a cinq, so i wired to a light on the dash. So at 90c that light comes on. The car isn't really overheating but it is hotter than my car normally runs, so there is in my opinion overheating.
Petrol light isn't on, it's just the light hitting it funnny
And nope, its no where near overheating - i shorted the switch so i could get a photo as i've not had the car get hot enough to bring the light on!