Radar Help Please

[Beachman]

Troubleshooting my radar issue. It is greyed out. It is a DRS6A X-Class. Have a TZT3 and a HUB 101. Have power on both sides of the invertor. Trying to test voltage at the radar. Manual makes it look easy to connect but I don't see how to get to the power wires. See pics. How do I get to the power wires. Blue/Red? I have bypass my Ethernet from radar to TZT. No luck.

 

[TheReaper]

Remove the circled bolts and slide out the TR. Once out, the power connection is in the back right corner.

 

[Beachman]

Thanks for that. I put the voltage on this plug. (See pic) Red and blue. Only seeing 6.7 volts. I am getting 27.2 out of converter with 12.5 going into it. Is this the correct spot to test voltage going into radar/at radar? I tested at the end of this plug. The plug was not plugged in. If so, should I start with a new wire?

 

[jp498]

Couldn't help but notice the dried salt in the bottom of the case. That is not a good thing.

 

[TheReaper]

Thanks for that. I put the voltage on this plug. (See pic) Red and blue. Only seeing 6.7 volts. I am getting 27.2 out of converter with 12.5 going into it. Is this the correct spot to test voltage going into radar/at radar? I tested at the end of this plug. The plug was not plugged in. If so, should I start with a new wire? View attachment 6409

That is the correct red and blue wire to check. There is a pigtail connection outside of the gearbox about 1.5 ft from the entry that can be checked. If good to the pigtail, then can replace just the pigtail. If not, then replace the scanner cable to the pigtail.

Also, as @jp498 mentioned...not good to see all that salt/debris in the gearbox...

 

[Beachman]

Well found it. The connection from boat to radar was not taped up like shown in installation guild. Have dime size corrosion hole in the pig tail. Found part number and will start making calls in the morning. I did have 25 volts at the end of the boat side cable. So I do have power to the radar unit. Which direction does the rubber grommet come out? For fishing the wire back to thru the radar. Also, I see where the saltwater was getting in, I fix that also. Thanks Report back shortly.

 

[TheReaper]

Appears that the grommet comes out of the bottom of the gearbox. It also appears that the damage in your second picture may be from a lightning strike or something which would then require a complete gearbox and scanner cable replacement. You can try just the pigtail, but you may find that it doesn't fix the problem.