BOB JOHNSON Wiring issues! again!!!!!!

[phoenixgold2100]

I have a 99 johnson 150 and the alarm goes on when the key is turned on and will not shut off (engine not running) so I know it's not an over heat issue. I disconnected the tan wire from the alarm and it kills alarm but when key is first turned the alarm has a dying chirp sound coming from it then stops. Is my alarm bad or is my tan wire shorted to ground and if so how would i go about finding it. I know they short to ground when they over heat but is there a reset after they do that?

Question 2> My fuel gauge doesn't work, I have confirmed the wiring is correct by touching the wires together at the sender spiking the gauge, I removed the sender and when I move the arm manually it moves the fuel gauge so I assume the float is not floating in the fuel. I am going to replace the sender but when replacing do i just get one with the same length float arm? (mine has no names on it as far as i can see)

Question 3> My tach doesn't work as well as my trim gauge all have power and ground according to the test light i hooked to the posts on the back of the gauges. I have traced wires to the trim sender white and tan and it seems to be correctly wired trim sender bad? I have traced the gray wire back to the rectifier and it seems right bad rectifier? Boat sat for a looong time from what I can tell do these things sieze up from sitting? Thanks.

 

[gm280]

Re: BOB JOHNSON Wiring issues! again!!!!!!

Not sure about any one of your issues, but with so many electrical issues, I'd be checking all the possible connections for everything electrical and their ground wires as well. One electrical problem is understandable, but so many electrical problems like you posted about actual points to a problem with possible grounds... If after you do check out the grounds and verify all the other connections are indeed correct and clean, then if you trace your problem to a sensors and such, I could believe those sensors and rectifiers could be bad...

 

[airman1094]

Re: BOB JOHNSON Wiring issues! again!!!!!!

I would say at the very least the rectifier is bad IMO! That usually explains loss of gauges other than bad or grounded wiring or failed sensors that I've seen in the past. As far as the alarm, have you checked the temp sensor? It could be stuck open causing a false alarm.

 

[bob johnson]

Re: BOB JOHNSON Wiring issues! again!!!!!!

well.... you got a few issues and I am not an electrical expert by any means.....I just have a few of those motors. You really need to get the manual and systematically run down the troubleshooting check list.....there is a reason you check certain parts before you check the others...id say you have maybe two different issues......one is a horn issue, and the other is probably in the rectifier-regulator.best of luck, ...THE MANUAL!!! BOB

 

[Silvertip]

Re: BOB JOHNSON Wiring issues! again!!!!!!

Let's start with the tach. You said the gauges, even the ones that don't work have +12 volts and ground as verified with a test light. That leaves the sender or wiring. However the tach doesn't have a sender. It counts pulses from the rectifier and turns that into an RPM reading. So the net result is that if the rectifier is bad, the tach can't work. the simple test for this is to look at the VOLTMETER on the console if it has one. If that gauge is reading 13 volts or so with the engine rpm at about 2000 then the charging system is working. If the wiring is ok between the tach and the rectifier, then move that wire to one of the yellow wires going into the rectifier. If the tach now works, make a permanent connection and go boating.

You need an ohm meter to verify the operation of the trim sender.

Fuel sending units are available in various lengths because of the depth of the tank. The length of the arm is of no importance but it must not rub against the side of the tank when installed. The fuel sender element must have a resistance range of 33 - 240 ohms.

 

[phoenixgold2100]

Re: BOB JOHNSON Wiring issues! again!!!!!!

So if i hook the volt meter to the battery while it's running it should have 13 + volts? Or if the volts dont rise then it's a bad rectifier? also are you saying to move the gray wire to the yellow wire? I am not concerened with the alarm I am going to install 2 temp gauges. how would i test ohms on the sender hook volt meter to it and have someone move the sender pedal? Also how would i test for a bad ground? the ground at the gauges or somewhere else? thanks. I have a manual and it all seems to be right just doesn't work.

 

[glenn property of pam]

Re: BOB JOHNSON Wiring issues! again!!!!!!

if the boat has been sitting a long while. most of your problems may be normal age related. on the tach you can try to change the switch position up and down then reset to the number it started on (small screw on back by turning it you will clean the tip of the contact just remember to set it back to where you found it)

trim sensor might be the same just lift motor then exercise the lever 10-15 times then test again. fuel float could be the tip makes better contact when its in your hand as it has more weight on the tip. If the float has a hole it would fell heavy. most alarms chirp when you turn key on i thought that was normal as its a easy way to check the alarm is still working.

true fact is you need a voltmeter with ohms so you can test the items some may be simple fix's while others may need parts

 

[phoenixgold2100]

Re: BOB JOHNSON Wiring issues! again!!!!!!

I just got a volt meter and everything has over 12 volts. I have tried moving the trim pedal a bunch of times and still no trim gauge. I'm in the process of checking grounds. I just pulled out the over heat short to ground sensors i guess you would call them and one of them wasn't attached to the plastic screw so does this mean it tripped? Do I need a new one or do i just make sure its not grounded out in the hole. I'm also in the process of checking ohms in the sender would the tach register anything on a volt meter from the gray wire? thanks.