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1) What should volt meter#1 read? _______

2) What should volt meter #2 read with the ignition switch open? ______ and closed?_______

3) What should volt meter #3 read with the ignition switch open? ______ and closed? _______

​4) What does volt meter #3 test? ______________

5) What does volt meter #2 test? ______________

6) What should volt meter #4 read with the ignition switch open?_______ and closed? _______

Wiring Test #5

Estimating volt meter values in a starting circuit

​Required information- An understanding of relay and solenoid operation, how to measure DC voltage, how to anticipate voltage readings testing in various locations with switches open and closed, how to measure voltage drop. To submit your quiz for a grade you will have to answer the questions in a word document and save the document as (Wiring Quiz #5 Estimating volt meter values in a starting circuit)  E-mail your word document to Mr. Cramer and make the message subject (Wiring Quiz #5)

​1) What will volt meter #1 read with the headlight switch closed? ______

2) What will volt meter #2 read with the headlight switch open?___ and closed?__

3) What will volt meter #3 read with the headlight switch closed?______

4) If volt meter #1 reads 12volts with the headlight switch closed is there a problem? Yes or No

Extra Credit- If there is no problem explain why the meter should read 12 volts.  If there is a problem describe the problem in as much detail as possible

5) If volt meter #3 reads 12 volts with the headlight switch closed is there a problem? Yes or No

Extra Credit- If there is no problem explain why the meter should read 12 volts.  If there is a problem describe the problem in as much detail as possible.

Wiring Quiz #4

Estimating volt meter values

Required information- An understanding of series and parallel circuits.  How to measure DC voltage.  How to anticipate a good voltage value in a circuit testing at various locations with switches open and closed.  To complete the quiz you will need to examine the diagram pictured below and answer the questions below the picture.  To submit your quiz for a grade you will have to answer the questions in a word document and save the document as (Wiring Quiz #4 Estimating volt meter values)  E-mail your word document to Mr. Cramer and make the message subject (Wiring Quiz #4) Important- I apologize for the quality of the white board drawing it will be cleaned up soon.  There should be a solid line between the bulb and ground #004, treat this connection as it's unbroken despite the broken line on the white board drawing


What is a circuit?

Answer: it's a path for negative electrons to flow from ground or battery (-) through a load to battery (+).

Wiring Quiz #3

Draw a light and horn circuit

Required information- An understanding of series and parallel circuits.  How to control high current circuits with a relay and keep switch current low.  Where ground side and B+ side switches are located.  An understanding of industry correct wiring diagram symbols.  How to calculate voltage, current and resistance using ohm's law.


1) Control the lights and horns with separate relay's

2) Protect your circuits with fuses rated at twice the circuits current

3) Control the horn relay with a ground side switch

4) Wire your high and low note horns in series

5) Control your headlight relay with a B+ switch

6) Wire your headlights in parallel

7 Make your horns 3ohms each and your headlights 2 ohms each

What is Ohm's Law?

Answer- It's an equation that explains the relationship between voltage, current and resistance

What is a series circuit?

Answer: it's a circuit that has one path for current and multiple loads/resistances.

What is a parallel circuit?

Answer: It's a circuit that has multiple loads each with their own path for current to flow through them. 

​What is a relay? 

Answer- A relay is an electro magnetic switch.  It is used to allow the control of a high current load with a low current switch.

How do they work?

​Answer- watch the video   

How do I measure or check for electricity?

Answer: If you want to use your fingers you'll need high voltage and a strong heart if you don't want to hurt yourself you'll need a multimeter or test light and some common sense.


What is electricity?

Answer- Electricity is the flow of electrons.  Some things to keep in mind as we begin this study is opposites attract and like charges repel.

Electrical

It's all about those lazy electrons.  I've never seen one but I've seen the work they do, good and bad.  Before I get started with all this boring electron, proton, neutron, series, parallel junk let me share some wise automotive sayings I've learned over the years from some of my formal and informal automotive instructors.  It's ok to laugh at every one of these but please don't forget them because they are all true.


1) You can't put the smoke back in a computer

2) Heat is a byproduct of current

3) Voltage will make you jump current will make you dead

4) Current follows voltage

5) If you want to find a short circuit just look for the smoke signals


If you understand these 5 rules you will probably do ok with electrical diagnosis but before we start, understand there is no substitute for using your brain here.  If it hurts to think or use your brain, you want to make friends with someone who has a brain and likes to use it so you can ask them questions.  That's right if you're not into all that learning stuff and hate reading words and letters just hang in there and I'll explain rule #1 and #2 first and if you don't catch on rule #3 and #4 will work everything out for us.  If you just went back and read rule #3 and #4 again and are laughing you'll probably be ok.