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I do not know about a 1988 Isuzu PU, but I have a 1992 and the vacuum diagram is on the underside of the hood. You may need to clean it up a bit to see it. I did. Hope this helps. morempg2u
2003 honda rancher vaccume diagram
www.autozone.com has much of the repair information available free online. You will find your fuse diagram there.
You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library.
if you can find an adapter which costs about $4 or $5 dollars, it will have the wire diagram on it
You can find a vacuum hose routing diagram for a 1988 Mercedes 190e 2.3 in the owner's manual. You can also find it at various auto part stores.
on the sticker under the hood
You can find a vacuum diagram for a 1988 Silverado with a 5.7 engine at your local auto parts store. You can also find one at most major book stores in a Silverado repair book.
It is a vacuum line diagram for a 1988 Toyota Corolla. What else would it be. :-) Just playing. You can find one [http://www.themotorbookstore.com/corolla2.html Here]
When making any changes to a vehicle, a diagram can help point the person in the right direction. A vacuum line diagram for a 1988 Plymouth Horizon can be found in its maintenance manual.
The Chiltons/Haynes 72300 has the vacuum circuits divided into the emissions, Fuel and brakes sections of their manual covering each vacuum hose.
A vacuum hose routing diagram for a 1988 E 150 van can be found in the vans service manual. The manual can be bought at most auto parts.
Use a Chilton repair manual.
In a Haynes manual At most auto parts stores
You can find a free Ford F1 50 vacuum diagram at most Ford dealerships. Many auto-parts stores will have the vacuum diagram.
I do not know about a 1988 Isuzu PU, but I have a 1992 and the vacuum diagram is on the underside of the hood. You may need to clean it up a bit to see it. I did. Hope this helps. morempg2u
Which vacuum diagram The Underhood for the engine or the vacuum for the interior /AC system?