'engine' light
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Junior User
Joined: Dec 2002
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'engine' light
'88 F150, striaght 6, manual 5 speed. This truck has 3 indicator lights; check engine, engine, battery. At low rpm, the engine light comes on. It's the kind of thing I'd expect from the battery light, if the alternator was weak. Any ideas? Oil pressure guage seems stable.
Hotshot
Joined: Jan 2004
Posts: 19,768
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From: St Louis
That "engine" light is probably a low oil pressure waring lamp.
If the pressure switch senses low pressure, it turns on that light.
One thing to consider: Is your oil pressure guage a true guage or is it a "mechanical idiot light" type.
Most Fords starting somewhere around the mid to late 80s went to the mechanical idiot type where in the guage either indicated half-scale or nothing. It was hard-wired to the pressure switch.
A true pressure guage has its own sender unit and actually measures the oil pressure. Readings will vary based on oil thickness, temperature, etc.
If you have a true pressure guage and it is indicating good pressure, I'd suspect the pressure switch.
Steve
If the pressure switch senses low pressure, it turns on that light.
One thing to consider: Is your oil pressure guage a true guage or is it a "mechanical idiot light" type.
Most Fords starting somewhere around the mid to late 80s went to the mechanical idiot type where in the guage either indicated half-scale or nothing. It was hard-wired to the pressure switch.
A true pressure guage has its own sender unit and actually measures the oil pressure. Readings will vary based on oil thickness, temperature, etc.
If you have a true pressure guage and it is indicating good pressure, I'd suspect the pressure switch.
Steve
Senior User
Joined: Jan 2005
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From: salem now then boxford
black electrical tape will fix that problem.
I hear Auto Zone is offering "free" engine light checks...i haven't tried it even though my engine light has been on for 4 years on my subaru.
I hear Auto Zone is offering "free" engine light checks...i haven't tried it even though my engine light has been on for 4 years on my subaru.
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Junior User
Joined: Dec 2002
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yes, Auto Zone does offer that service. They tell you what the code says and will sell you the parts, if they have them. It's a great service, but not applicable to my problem, since it's not the 'check engine' light that is coming on.
