x type REAR indicators not working
#21
09-12-2018, 06:54 AM
iownme, I go back to how the switches feed into the circuit. The switches (both turn and hazard) are inputs to the GEM module. It is a yes or no signal (ie, you have a ground or you don't). The GEM module takes this yes/no signal and if it is a yes (ie, the switch grounds the wire), then it makes the lights flash. No ground, no flash. It isn't a turn signal because if you look at the turn signal outputs (ie, IP53-1 and IP53-3 from Fig 8.2 and 8.3), those 2 wires power both the front and rear turn signals. Since the front turn signals work, we know those lines through IP53-1/3 are good. Since all the turn signals work with the hazard switch, we know that is good. So, all that you are left with is the GEM module or some funny problem that I am not seeing. I have a hard time believing that the new GEM Module became bad just by installing it (the GEM module was proven working properly prior to being removed from the donor car).
This is where I am scratching my head, trying to understand what is going on. I feel like I am missing something and wish I could put my hands on the car to figure this out.
This is where I am scratching my head, trying to understand what is going on. I feel like I am missing something and wish I could put my hands on the car to figure this out.
When I changed the GEM module did I need to change anything else on the car to update any software.
Is it worth disconnecting the battery for a few hours to see if that does a reset of the systems, or could that cause more issues?
#22
09-12-2018, 06:57 AM
#23
09-12-2018, 09:33 AM
#24
09-12-2018, 11:19 AM
so...after consulting the wiring diagrams i have to agree with thermo about it being the gem. My ilogical side is still fighting that though.
so at least another gem is still a good posibilty at this point ;@)
my folks live just down the road from you in Wiliton....ma makes a great cuppa but her jaguar wiring skills are a bit lacking
so at least another gem is still a good posibilty at this point ;@)
my folks live just down the road from you in Wiliton....ma makes a great cuppa but her jaguar wiring skills are a bit lacking
#25
09-12-2018, 03:38 PM
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Graham, I would say to disconnect the battery and let the car set for like 5 minutes (really only need about 30 seconds, but just to be sure). Then see what you have then. I can't imagine another module affecting things, but gotta love modern day computers. The system is not that difficult. But, what you are describing is not passing the "how it should operate" check.
#26
09-13-2018, 04:10 AM
Graham, I would say to disconnect the battery and let the car set for like 5 minutes (really only need about 30 seconds, but just to be sure). Then see what you have then. I can't imagine another module affecting things, but gotta love modern day computers. The system is not that difficult. But, what you are describing is not passing the "how it should operate" check.
Disconnected the battery for 1 hour while I popped out. Came back, reconnected battery and made no difference, rear indicators still not working from stalk but fine from hazard switch.
Disconnected battery again, fitted 3rd GEM unit, refitted battery and still the same issue.
For my own sanity as much as anything else I disconnected the hazard switch but that made no difference to indicators. Still working on front and side but not rear. Re-connected hazard and checked both connectors full engaged, again no difference
I really am confused now
Last edited by Graham W; 09-13-2018 at 04:42 AM. Reason: more info added
#27
09-13-2018, 05:50 AM
#28
09-13-2018, 07:57 AM
#29
09-13-2018, 08:04 AM
#30
09-13-2018, 08:11 AM
i'll update soon
#32
09-13-2018, 08:17 AM
#33
09-13-2018, 08:23 AM
This is getting even more confusing. The light board I have does not have a reversing light but when plugged into another car (just checked again) then all lights work correctly (driving, brakes, hazards and indicators. When I plug the light board into the Jag ONLY the hazards work. Driving lights, brake lights and indicators all DO NOT work.
#34
09-13-2018, 08:25 AM
Ah, this is starting to look more promising. Where is this module and what am I looking for?
#35
09-13-2018, 08:44 AM
Tried to attach some pics but don't seem to be able to
#36
09-13-2018, 08:48 AM
yes, were heading in the right direction.
just dont turn yet....haha
with this new info im sure thermo will be able to finish this if i cant.
i dont know the TT module location but what you just said about the reverse light etc all adds up according to the wiring diagram.
those diags are not my strong point but thermo is good with them.
there appears to be 4 connectors between the gem and bulbs, including in and out of the TT module.
that line includes rear turn lights and reverse and i think fog
just dont turn yet....haha
with this new info im sure thermo will be able to finish this if i cant.
i dont know the TT module location but what you just said about the reverse light etc all adds up according to the wiring diagram.
those diags are not my strong point but thermo is good with them.
there appears to be 4 connectors between the gem and bulbs, including in and out of the TT module.
that line includes rear turn lights and reverse and i think fog
#37
09-13-2018, 08:51 AM
yes, were heading in the right direction.
just dont turn yet....haha
with this new info im sure thermo will be able to finish this if i cant.
i dont know the TT module location but what you just said about the reverse light etc all adds up according to the wiring diagram.
those diags are not my strong point but thermo is good with them.
there appears to be 4 connectors between the gem and bulbs, including in and out of the TT module.
that line includes rear turn lights and reverse and i think fog
just dont turn yet....haha
with this new info im sure thermo will be able to finish this if i cant.
i dont know the TT module location but what you just said about the reverse light etc all adds up according to the wiring diagram.
those diags are not my strong point but thermo is good with them.
there appears to be 4 connectors between the gem and bulbs, including in and out of the TT module.
that line includes rear turn lights and reverse and i think fog
#40
09-13-2018, 09:12 AM
Graham